Solving Quadratic Simultaneous Equations

GCSE Maths revision tutorial video.
For the full list of videos and more revision resources visit www.mathsgenie.co.uk.

[@pritomdey6745]

That was very helpful thanks. You are able to explain better than my maths teacher. :) Continue the good work.

[@thomaslindsay1607]

Could not agree more

[@helalahmed235]

@@thomaslindsay1607 shuttttup

[@yorambo2857]

@@helalahmed235 fuck u

[@annieducamerounyatmi4025]

​@@helalahmed235why should he

[@rKaraa]

hi how r u doing now, what did you get in your gcse, 6 years later....

[@helalahmed235]

I am new in the higher tier and this video was so helpful for me. Thanks a lot and Good Luck to everyone for their GCSEs

[@A7ggEZ]

shuttttup

[@ObeseGorilla229]

shuttttup

[@ruhul-aminahmed3993]

Finally I know how to this, no thanks to my maths teacher. Thanks a lot

[@stoive423]

You are such a generous and easy to follow person, I am truly grateful towards the generosity you give to aid others in the higher maths field. Thank you so much Maths Genie, you have definitely secured my maths GCSE

[@tripleaaamusic.official404]

Thank you very much! been struggling on this topic for a while and this video made it so much more easier

[@lil_nut2232]

Solid mate, absolutely solid.

[@Nitroade24]

Hollow Knight Gang

[@izzie2625]

This was actually really helpful, thank you :)

[@Notbell_202]

thank you so much. this is grade 9 on our upcoming maths test and this really helped!

[@ichiro3563]

this was the last ever gcse maths video i ever watched last night at like 3:40am, didnt even come up on the paper today 😂😂

[@archiep.2426]

Thanks, this is one of my questions for my further maths a level induction quiz and i had no clue how to do this

[@scorchedhaunter]

Thanks. That was extremely useful!

[@aminoor4970]

Thanks for this cleared up alor of misconceptions

[@Incental]

You're actually a legend bro

[@Mqn901]

Great video thanks !

[@darion1728]

This was my first grade 8/9 video from maths genie and I felt so betrayed when the calculator showed up because thats the first time I've been confused on this channel

[@helalahmed235]

I am not so confused but the topic is so difficult.... Watch again so it will feel a bit easier now

[@josh-blastroyale2700]

thanks this is really helpful

[@alarky1142]

Very clear and useful

[@joynekesa1065]

the lengh and width of a rectangular signboard are (3x+12)and(x-4)respectively .if the diagonal of the signboard is 200cm , determine its area

[@joynekesa1065]

someone plz solve this

[@Mateusz7821]

lol have you solved it

[@spbeano8859]

very helpful!

[@mohamedfaisal7587]

Great thanks teacher 🤗

[@user-qr2zi6xt7l]

thanks it helped me a lot

[@nuttheses9589]

Thank you very much

[@dermotmccormack9436]

very helpful

[@stressedvery4763]

hello could you pls explain why you didnt simplify the last question cause they are all divisbe by 2, thanks!

[@tomasmeghani1658]

cheers more qualified then my teacher

[@epickarisma8901]

are the solutions points where the graphs cross?

[@jacquelineblake1193]

I am having trouble finding quadratic equations difficult to understand but eager to learn these so please help me to understand these.

[@Jesse-hy6ie]

How do you know when to do the quadratic formula and when to factorise?

[@alcoholicbelly1313]

Quadratic formula when you cant factorise. Factorise when you can

[@jacquelineblake1193]

maths genie, where is the '2x' coming from please? 1:10

[@RM-dawg]

How do you make it y= bc my question doesn’t start with y=

[@tdog8049]

make Y the subject by subtracting or adding x or other numbers e.g X+Y=2 you would subtract X to make Y the subject = Y=2-X

[@user-jq3qt8no7h]

@@tdog8049 no

[@abibott5086]

How many marks would these be?

[@YoutubeChannel-ll9yn]

On a GCSE Higher Maths Paper you could expect to earn 4-5 marks depending on how much work is needed to answer the question

[@dandyrion5779]

thanks g

[@ArlenIrons]

All the topics in your website, will they be in the GCSE exam?

[@umairismati3768]

Yes it will

[@lenlove4eva]

its been a year, were they on the gsce exam?

[@sadikshurie4255]

it’s been 2 have they been on it yet

[@user-iq7hw2qf6e]

It's been 3, we're they on it mate

[@shaybe8373]

its been 4 years were they on the exam

[@ipr0907]

good shit

[@gillwaham7392]

absoloutly exsquisite

[@Fansofwow]

so when do you use the quadratic formula and when don't you?

[@onyinyeobudulu3662]

You use the quadratic formula when solving the quadratic equation by using the normal technique is impossible. However, you can use the quadratic formula to solve any quadratic equation (even in instances where you can use the normal method) People usually refrain from using the quadratic formula before trying the normal method because it's lengthier and a waste of time if the normal method works. So in summary, you can use the quadratic formula with any quadratic equation at GCSE level.

[@Fansofwow]

Onyx Sumiko Understood that now. What I meant was why did he use the quadratic formula when there was something like "5x". When there was 'x' by itself then I knew where I went wrong because he used the quadratic formula when there was something like "4x squared+12x+9=25. That's where I got confused, I then soon realised that after figuring it out and using my brain. Lol. Thank you anyways.

[@onyinyeobudulu3662]

Ah, I see. Okay. ^-^

[@firstname6591]

When there square equation it quad

[@mariamismail2764]

i love u thx

[@tsukoyomi7965]

Are the videos from 2006 rly helping?

[@lylahnight6528]

Yes

[@tsukoyomi7965]

Lylah Night no THEYRE not

[@fannymontregal8331]

@@tsukoyomi7965 it does if you have the intellect to know what hes explaining

[@meerkatking5521]

@@tsukoyomi7965 this vidoes was made in 2016 not 2006

[@pratheesh2105]

that damn advert always attacks me when i'm having a mental maths breakdown the night before a test

[@stonker2868]

you factorise incorrectly , at 9:43 , to get -3x you would have to + -1x to cancel it out and simplify , not take away or else you'd be taking away from a negative making it -4x not -3x

[@m_rashid0435]

At 1:40 could it be (x+1)(x-3)=0 ???

[@m_rashid0435]

thanks, i wasnt sure

[@divine7325]

omg this is so easy i feel dump for not understanding it in class

[@noahkettunen1686]

I don't get the factorising part.

[@shaylas9199]

Wat do u do if none of the y and x values aren’t on their own in the question

[@serwerkhan7528]

2xsquare -4ysquare=50 X,y=6 ka solution kr dain

[@mandeshshrestha805]

the answer to the last question is wrong because he did 4 times 2 times -12 in the quadratic formula instead of 4 times 4 times -12

[@scottnelson3525]

Mandesh Shrestha i

[@dopetroller2724]

@Alan Ali 10 i

[@Bihghhjiytt]

Alan Ali 11 forgive me daddy

[@jasthfc352]

how’d you know when to use the quadratic formula

[@robinalsop9698]

You can use it when the equation is equal to 0, instead of factorising like he did. When it is a relatively simple equation it is quicker to factorise, but for more complex ones it is easier to use the quadratic formula. It’s just down to preference really

[@yvephix1325]

Idk what to do when one of the lines are x = 2y + 5

[@mathsgenie7808]

You could rearrange the equation to make y the subject, or...just substitute some y values in to find the x values. If you sub in y=0 you find x=5, so (5, 0)

[@Qillogram]

600th like

[@niyazhussain1037]

Put the working out in a way that is difficult to understand. The 0 is also on the wrong side which also confuses on top of that

[@anatastiao4537]

it doesn’t matter what side the x is on

[@anatastiao4537]

I found the explaination clear

[@abualasif]

bruh are you good, do you know what maths is

[@user-qr2zi6xt7l]

how do u not understand

[@me3474]

okay so im confused in 9:50 you say that (x-1)(x-2) but then you say x = 1 and x = -2, shouldn't x be = -1? and -2?

[@natashasethia4490]

No because when you solve the equation (x-1)=0 and get 1 to the other side, 0+1 = 1 same way with (x-2)=0 solve equation by getting 2 to the other side, the sign changes from - to + hence giving the answer +1 and +2

[@me3474]

@@natashasethia4490 ohhhhhhhh okay I get it now tysm!!

[@natashasethia4490]

@@me3474 Oh no issues! :)

[@allanmurray479]

got to ask who is ever gonna use this form of maths ? i am trying to help my daughter. now am just as confused as her.

[@mathsgenie7808]

Allan Murray the higher level maths is used in science, technology, engineering and finance. But yeah it isn't widely used in "real life" situations. Try looking back at substitution and Solving Equations (linear and quadratic) before moving onto this topic.

[@feero9680]

General use of simultaneous eqn is like the following example: Buying 3 drinks and 2 burgers cost you a total of $8.50 dollar The next day you buy 6 drinks and 1 burger and that costs you a total of $11 dollar. You cant remember how much each drink and burger cost, so you apply this simultaneous method to find the of each product. Let drink becomes d and burger becomes b, now eqn is look like this: 3d+2b = 8.5 6d+1b = 11

[@JJ_EETFUK]

@@feero9680 I mean idk about you but I'd just look at the menu to find the prices

[@codingwithoutbordersonline1945]

Jacob lol

[@abualasif]

@@JJ_EETFUK boi

[@S73V3N]

Why do I try to do the question in my book, burning my brain just for the question to be the first one on here TwT

[@ysingh311]

I’m the 50th comment

[@amenzerabruk4795]

the last answer is wrong

[@cryptik6780]

ik mate

[@gethinsaltmarsh4921]

word

[@tommcglone4080]

Shush

[@hassanmangat3471]

Isnt this for c1 you cant use a calculator in c1 paper(for quadratic formula)

[@mathsgenie7808]

Hassan Mangat yeah true - if one of these questions comes up in the c1 paper it will either be a factorise question or you will have to leave the answer in surd form.

[@hassanmangat3471]

Ok thanks

[@sombi8807]

sounds leng

[@noahaskew8514]

My maths teacher is bad at teaching. You're not.

[@sajalotfy9024]

why are u screaming at me

[@codedlAnguage]

My favourite Maths problems to solve. 😃😃👉🍌💝🍌👉💝💝💝💯💝👉🌈👉🍌🍌🍌👉😃😃👉🔯🐇🎸🔯👉😃😃