Casio Classwiz fx-991EX fx-570EX fx-991DEX solving for X in an equation

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Watch new full video manual for this calculator • Getting Started with C...
In this video you will learn how to use Solve function of Casio FX991eX calculator to solve for X in an equation.
fx-991EX fx-579ex User manual support.casio....
Tutorial by Ahmad Shamshiri from Canada
#equaser #equaserCasioFX991EX #equaserCalculator
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[@equaser]

Learn everything this calculator can do . Full video manual for this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@jameslawrence7896]

Thank you again Mr Equaser, I am so glad you made these videos!

[@equaser]

you are welcome. 👍

[@deathstargod8080]

@@equaser hi

[@chrisstasinopoulos8895]

There is a faster way to type X without using the ALPHA button. You use directly the X button (right below the ON button), boom!

[@equaser]

nice tip. Did not notice that. Thanks

[@chrisstasinopoulos8895]

@@equaser I just pointed that for the viewers. You already knew about that tip, but apparently you are a very kind person who came to thank me anyway! Greetings from Greece my kind sir!

[@taosifahmedfiroz4484]

Thanks, it helped.

[@247_sirazulmonir9]

thanks

[@nahtE2004]

Wow I never realised that 😂😂

[@alperen3486]

I've just bought it and saw a video saying that your calculator is fake if it can't do basic equations and calculating linear equations was a nighmare until finding this video. Thank you very much !

[@equaser]

you are very welcome. If you have this calculator, you must watch this video which will blow you mind. All features explained that you never thought possible kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch first 40 seconds so you know how to navigate the video.

[@alperen3486]

@@equaser I'll check that one for sure, it looks very helpful

[@ainaezrina]

Alhamdulillah i found this. Thank you sir for the sharing

[@equaser]

Alhamdulillah. You are welcome. salaam. Ahmad from Canada.

[@alexeypopov314]

Thanks, man! I'm trying to learn this calculator and you are of great help!

[@equaser]

you are welcome. I am please you found it useful. I have more videos on this calculator search my channel.

[@alexeypopov314]

@@equaser Will do! Thanks a lot!

[@evren.builds]

Thanks man, I was confused by the x=0

[@equaser]

you are very welcome.

[@brokenwindow1715]

May God bless you and your family. So much help!!!

[@equaser]

You are welcome. Know your calculator Learn everything this calculator can do . Full video manual for this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@TheChocolatBlanc]

A big thank you , I think than even my teacher doesn't about this :D

[@equaser]

you are welcome. Tell her/him about the calculator and my channel. Euqaser. Thanks

[@zenn4752]

thank you bro, just wanted to make sure it can do this before buying it. :3

[@equaser]

you are welcome. The best "Thank you" for me is to subscribe to my channel. thank you.

[@multidomar]

Thank you thank you thank you so much!

[@equaser]

You are most welcome. 👍

[@Tikolu]

Thank you for explaining!

[@equaser]

You are welcome.

[@nemanjamihajlovic3064]

Thank you mate! I am Civil-Hydro Engineering student so this video helps me a lot! All the best!

[@equaser]

You are welcome . I just posted the full manual with tones of example all features you will be surprised. Use chapter to jump kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch for 45 seconds to know how to watch

[@realclassy7392]

I'm very benefitted by this video..

[@equaser]

Good to hear that.

[@richardevans9465]

Thanks, that was a great help,much appreciated.

[@equaser]

You are welcome.

[@woozy1]

thanks for saving my GCSEs! Ur the best :D

[@equaser]

you are welcome.

[@woozy1]

Equaser.com it got cancelled but i still did well in my mocks :)

[@memecage7029]

Woozy lol

[@woozy1]

MemeCage this comment aged well lol

[@Moosarehman9877]

Thnx for the trick you are god.

[@equaser]

May God guide us to the path to know he exists. You are welcome. Here is the full video manual for this calculator with tones of example all features you will be surprised. Use chapter to jump kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch for 45 seconds to know how to watch.

[@maciejszyduczynski7166]

Hi! When solving square equation (for example x^2=25) this method it only shows one (-5) of two (-5 and 5) values of X. Is there any way to display both using this method (and not by using Equation/Func (menu-->A) function)?

[@equaser]

Know your calculator Learn everything this calculator can do . Full video manual for this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@javiervincentangelos.4796]

did you find other ways to get the other value of x?

[@tymofei8586]

It probably using newtin rhapson method and you can specify initial value from where it gonna start converge.When you press solve enter possible values greater then positive root to converge to positive root or enter lower values than possible negative root to converge to negative one..Figured out on my own after went mad ..

[@torbiboy3623]

That's a great explanation but in the title it says that it works on the fx-87DEX, too. However, there doesn't seem to be a solve function on that device, all other necessary tools and characters exist though.

[@equaser]

Thanks . Upon checking the manual indeed you were right and the features not available in that calculator.I just removed it for title.

[@claudehermineakette9222]

you just save me. thank

[@bibimoriom753]

Thank you very much

[@equaser]

You are welcome I just posted a full manual of this calculator that you will like kzbin.info/www/bejne/panSdZKaftmCj6s

[@RuhabDabeer]

Wow I didn't now you had to press equal again Cuz I kept getting 0 as my answer

[@ericsj7288]

After that press "="

[@equaser]

cool. ❤️

[@prathameshpatil375]

May god bless you ♥️

[@equaser]

Please see the Amazing Full video that explains all features of this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@mark.p9824]

And if it is a quadratic equation how can I see all of the anwsers ? (because for a quadratic equation which has 2 anwsers I can see just 1)

[@equaser]

this is NOT equal zero. You have to use another mode to find that. I have another video explaining that kzbin.info/www/bejne/qqHZgmhnqNxpgck

[@247_sirazulmonir9]

thanks so much 😘

[@abhimat]

Good examples

[@equaser]

I just posted the full manual with tones of example all features you will be surprised. Use chapter to jump kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch for 45 seconds to know how to watch

[@shashank_d_a]

Thanks soo much

[@equaser]

You are welcome I just posted a full manual of this calculator that you will like kzbin.info/www/bejne/panSdZKaftmCj6s

[@marviesandrinecereno358]

Thank you, sir!

[@equaser]

You are welcome.

[@verticaldoor891]

Good Video Thank you

[@equaser]

You are welcome. 👍

[@NashFord]

thanks but why does my 991ex in the equation cos(45) one, the result is 0.321?

[@equaser]

Chang the unit, degree and radian

[@rishavsingh2010]

Please do an example using a sharp calculator

[@equaser]

Sharp does not have such feature

[@jaybartoli6855]

THANKYOU

[@equaser]

You are welcome.

[@D_kiki999]

What mode is your calculator on?

[@equaser]

no mode change. just normal.

[@Sparkz0032]

His calculator was on radians (shift --> menu --> 3(degree) or 4(radians))

[@meme-sama1901]

@@equaser mine not working man I got the x=0 but if i press equal sign it got math error

[@iluvpwny7565]

@@meme-sama1901 you have to press "shift + calc" and then hit equal sign, this way it should work.

[@udaykirangarlapatti1622]

TQ bro

[@equaser]

You are welcome. you have this calcualtor, then watch the full video tutorial so you never miss important features of this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@sanjeepgupta1418]

Thanks

[@equaser]

You are welcome

[@waelabuhamaidan5350]

Thank you i was going to buy new one haha

[@equaser]

You are welcome.

[@richardevans9465]

Will this calculator simplify algebraic fractions. Thanks for your time.

[@equaser]

NO. The final result can only be a number. :(

[@gokulmanikantan9358]

Solve y for me using Classwiz 1/800y = 1/79( (1/0.95-y) + (1/0.0949-2.9y) ) It shows only one value. I want both the values of the derived form of this Quadratic Equation.

[@equaser]

for quadratic is not part of the solution using solver. for quadratic and all features of this calculator please see this kzbin.info/www/bejne/rYDadJlpgMlrY5Y full video manual

[@dr.paddlesmack2054]

Hello this is a good video but it doesn't give my question a solution. I am doing a basic-medium level vector problem and I need to solve the simultaneous problem: at-13t=-250 bt-9t=750 a^2 + b^2 = 400^2 . Help me solve this please. URGENT.

[@equaser]

sorry I was on vacation. You have to enter it in the format calculator accept it. The calculator can't solve for non-linear equations. yours have a²+b². The a² can't be solved.

[@yigitcan824]

I have a question here,why does it show _0_ for example here ar 0:57

[@equaser]

you made me watch the video. I played and I explained what it is. pelase watch.

[@mgnarit]

Hello. I want to ask regarding shift solve for angles. For example, my angle is 100degrees. 100 sin (100)=98.48 .. If i input 98.48=100sin (x) and use shift solve, why cant i get 100 as x?

[@equaser]

Make sure to set the unit in radian. Also remember the Solve feature can’t always solve.

[@alshark294]

Hello for some reason the first w Equation wasn't working on my calculator but the others worked

[@equaser]

Please see the Amazing Full video that explains all features of this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@moseselijahsanpascual7890]

thank you! what if i have an equation with x and y, and i want to solve for x in terms of y. is the calculator capable of that?

[@equaser]

as I said, this can solve only ONE variable.

[@MatheusOliveira-zy5dg]

Thx man!

[@equaser]

You are welcome.

[@sadidsaadshuvo1688]

Helpfull !!!

[@equaser]

then watch the full video that convers everything kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@ana95053]

Do you know where is that CALC/solve button on a Casio fx-82MS scientific calculator? I can't find it. Thanks

[@equaser]

Your doesn't have it. Sorry :-(

[@hemantakakati1103]

I don't know why whenever I try to solve for x , x^3-x-4=0 . I always get ans x = 1.796321903 no matter what value I put. For ex. if i put x=2 I still get ans 1.796321903 when correct ans should have been 2.

[@equaser]

yes the. solution is 1.79 see the graphe here www.desmos.com/calculator/xjqkv17gih

[@fruffers]

After I press equals my calculator goes blank? Then it says Cannot Solve.

[@equaser]

of course it will. I mentioned that it can't solve everything. try the example I gave to make sure you understand how to use it.

[@fruffers]

@@equaser Thank you. I think I did something wrong, I saw it work afterwards. I am also trying to find out how to sum algebraic equations like 6x + 2x + 2a - 8a on my calculator for example but my 991EX Casio calculator will not let me use the algebraic letters if I do not give them a value, when I was hoping to only get the letters as the output, not to assign any numbers to them.

[@gamingworld0492]

thnq sir

[@equaser]

You are welcome . I just posted the full manual with tones of example all features you will be surprised. Use chapter to jump kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch for 45 seconds to know how to watch

[@syahrul.66]

how to change the answer, decimal to fraction in 2:38 ? example: -3= 4/3 - 3 + x and the answer is -3.3333333... I can't use the S-D button

[@equaser]

Some values are not possible to convert to fraction. Perhaps set the decimal points yo 3 or 4 , then you may get fraction

[@equaser]

See this full video manual and learn all feature of your calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@charlottechen8441]

Thanks Sir, but if I have a 2power of X, that I need 2 solutions, how can I get another solution?

[@equaser]

You are welcome. Know your calculator Learn everything this calculator can do . Full video manual for this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@khaloof.m1117]

whenever i press = after getting X= whatever it gives me an error

[@equaser]

It is because you don’t follow the exact instructions. I know that .

[@mehwishbhatti6207]

It keeps on saying syntax error? I wrote 8x+2=10 I did what u did pressed shift solve and then the "=" sign but it says syntax error

[@equaser]

You must be in normal mode.

[@md_nawshin_zaman]

There is x button on top right

[@equaser]

Watch this and all your questions answered and know what your calculator does, just watch first 45 seconds kzbin.info/www/bejne/rYDadJlpgMlrY5Y

[@deeem27]

Thanks. :)

[@equaser]

You are welcome.

[@javiervincentangelos.4796]

is there a way for met to find the other value of x since the answer only show the first value of x

[@equaser]

you get multiple values for x then your equation has x with some values., then use polynomial solver of this calculator. Here is the full video manual with tones of example all features you will be surprised. Use chapter to jump kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch for 45 seconds to know how to watch

[@benjaminabrioux6296]

How do you do this type of calculation with a sharp calculator?

[@equaser]

Sharp doesn't have this feature at all.

[@no-io5hg]

Tysm

[@equaser]

You are welcome . You own this calculator so here is full manual for this calculator with tones of example all features you will be surprised. Use chapter to jump kzbin.info/www/bejne/rXbddaFmg7V_m7c must watch for 45 seconds to know how to watch.

[@engr.muhammadtalha4839]

please mention calculator settings bro how to set it up

[@equaser]

I have tones of videos on this calculator here but I will try to make another video just for settings. kzbin.infosearch?query=FX-991ex

[@carlossiuv9701]

it is very dificult to follow the instruction becuase i can not see all key board of the calculator.

[@equaser]

Listen to what I say. If you have hearing problem then turn on the caption/subtitle

[@georgem4713]

In the last equation my calculator returns a value of 0.321782581, L-R=0 instead of 0.335627954 !!! Any comment ? Is anyone else having different results ?

[@equaser]

Have you watched this new video ?I just posted the full manual with tones of example all features for this calculator you will be surprised. Use chapter to jump kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch for 45 seconds to know how to watch

[@garzpogi887]

Why no matter I tried to solve your last sample equation the answers is always 0.321782581 and not 0.335627954 as your answer.

[@equaser]

I am not sure what would cause that. Even though I know DEG or RAD will have any affect, just try to change that and try it again.

[@Idealwallah]

Sir ! 3rd calculation not match my fx991ex , Why No match plz help.

[@equaser]

follow and see exactly what I did. set Degree, RAD

[@Guiroller1]

Is it possible to solve inequalities like this?

[@equaser]

I don’t remember what I said in the video . Either watch the video or see the description and if it is listed.

[@muhdfikriasari6964]

tq

[@equaser]

You are welcome. If your name is Muhammad then Muhd is not Muhammad and very disrespectful to beloved of God حبیب الله, his prophet. Salam

[@botail_]

When i tybe |3xX|=9 It only show me one solve X=3 It must have tow solves X=3 X=-3

[@equaser]

I belive you equation is this: 3x^2-9=0. how do you enter 9? you must enter it a=3, b=0,c=-9 and you will get the right answer. you have to move 9 to the left side which becomes -9 and which would be the value of c.

[@iMjune0627]

Can it solve x^2? As I only see one x value only. How to get anothet x value?

[@equaser]

Here is the video for that: kzbin.info/www/bejne/qqHZgmhnqNxpgck

[@avluv69]

angle unit degree..

[@frankcha986]

the Last calculation is wrong. You have to change the mode from Radical into Degree to input COS(45).

[@equaser]

Thank you. the method is correct. the mode is up to the user either DEG, RAD or GRAD.

[@abdwahab2741]

mine shows Cannot Solve . I dont know why

[@equaser]

Try the exact value. I mentioned that it can’t solve everything.

[@dat4949]

U know that solve button on Casio fx cg50 graphing calculator?

[@equaser]

I don't have the calculator in hand, I am going to get it in the near future.

[@dat4949]

Okay I used fx 991es it easy then I change to cg 50 very confusing.

[@CreatorFlex]

@@dat4949 graphing calculators dont usually have algebraic manipulation , it is banned for most exams

[@zawanaa.z6384]

Hi.. I need some help.. My calculator 991ex casio classwiz got the different answer.. Its already happened 3 times.. My calculator answer its different even my teacher and i have the same model calculator... I donno who i can ask.. Can i have your EMAIL so that i can send a picture what is happened

[@equaser]

Hi , different answer at what type of questions? Is it involved sin and cos? Setting DEG or RAD makes big difference. Rest the calculator and try it gain

[@equaser]

Have you watched this new video ?I just posted the full manual with tones of example all features for this calculator you will be surprised. Use chapter to jump kzbin.info/www/bejne/rYDadJlpgMlrY5Y must watch for 45 seconds to know how to watc

[@nvttyoung]

Hi Sir, how do you solve for two variables in terms with the other. Example, 5x+2y-14=0 when x=2 To solve for Y in 991 ES: Input: 5x+2y-14=0,Y pressing shift solve, X? Input 2, Solve for Y? Equals gives the answer of 2. I can't do this function in 991-EX. It gives a syntax error. Though I am aware you can solve by substituting x with 2.

[@equaser]

you can do up to 8 variables, A, B, C, D, E, F, X and Y. but X is always the variable SHOULD be unknown. so you should enter variables. so use 5x+2y-14=0 where X should be unknown or switch the x and y. X must be unknown. Enter the value of Y and it will solve for X

[@nvttyoung]

I got it. Shift solve then input the value of x which is 2, equals it should automatically solve for y.

[@equaser]

No. It will not solve for Y. It always solves for X. So you have use the 2 for Y, make your equation as 5y+2x=14=0

[@shamilaazwar5754]

Can I use fx 570ex in IGCSE exam?

[@equaser]

Yes you can. I just check the page here you can see it: help.cambridgeinternational.org/hc/en-gb/articles/115005425605-When-can-I-use-a-calculator-and-what-calculators-are-acceptable-

[@haseebchowdhury]

Thank you ^_^

[@equaser]

You're welcome 😊

[@iwtd9852]

Should the mode on my calculator be in complex?

[@equaser]

No.

[@aronlengyel8614]

Can it solve second degree equations?

[@equaser]

in this mode you can solve almost anything. For quadratic and cubic equations, I have another video.

[@meme-sama1901]

Mine is math error if i press equal sign pls help.

[@equaser]

Try entering the exact value and then try your own equation. it should work.

[@meme-sama1901]

Man i hot x=0 if i press equal sign math error how? pls help

[@equaser]

if you have the same calculator, made sure it is in normal mode. It will not give you error if you follow the insurrection I've shown.

[@meme-sama1901]

Why i press equal error

[@equaser]

unless you have got another calculator, it should work.

[@ragswag123]

Press shift calc

[@DISCO_DUCK.]

Doesn't work. I keep getting 12.81

[@equaser]

make sure to first do the example I have given. if doesn't work then reset your calculator. Watch Full video manual for this calculator kzbin.info/www/bejne/rYDadJlpgMlrY5Y you will be surprised about the feature of this calculator. Make sure to watch first 50 seconds to know how to watch.

[@Alana-nd4ih]

Mine keeps on saying error

[@equaser]

what error? you must be in normal mode. Follow the instruction in video and it will work if you have the same calculator.

[@varun9512]

My one is saying error also

[@varun9512]

Can u help us

[@orjwan8034]

it keep giving me syntax error i tried several times

[@ericsj7288]

U r doing mistake After typing your equation as suggested in video, don't press "=" Press solve button which is at CALC button

[@equaser]

@erics_j have I made mistake in the video?

[@ericsj7288]

@@equaser not u buddy, one who commented here

[@mattybees5570]

gru?

[@equaser]

?

[@Arsaroon]

This is just confusing for me If I said “Solve” then fricking solve it for me Not pulling it out of memory!?!!😂 Respectfully If that is the case then there’s no need for video with 150,000+ views like this

[@denizerdem6452]

i have problem about the solve function. (x^2)-x-2=0 İn this equation there is two results. 2 and -1. But the calculator shows me only one result by using the solve function. How can i fix this ? pls help me

[@equaser]

please try again. It should work. did you enter a=1, B=-1 and C-2?

[@gedo1919]

Deniz Erdem Try to solve the quadratic equation in the Equation/function mode, this will give you all results based on the power of the polynomial, you can access this mode by MENU, scroll down to option A, 2: polynomial and simply type in your equation, I hope that helps :)

[@dwaynevillariza5967]

i get x= 0 everytime

[@equaser]

Must be doing something wrong. What is your formula? Do you enter all values ?

[@pearlcalape721]

Now i knooow

[@equaser]

👍👍

[@talhaahmed158]

Thank you 😊❤️

[@equaser]

You are welcome. ❤️

[@khalidsaeed945]

thanks you so much

[@equaser]

you are welcome.

[@davy5537]

thanks

[@equaser]

You are welcome. Please subscribe. I appreciate it and helps my channel grow. Thank you

[@gamingmahmoud3133]

Thanks

[@equaser]

Welcome

[@samirsidat5616]

Thanks

[@equaser]

You are welcome.