Finding the quadratic equation given three points

Finding the quadratic Equation given three points.

[@Leadbraw]

God bless people who post math tutorials on KZbin.

[@kewlsunglasses6362]

Shouldn't you be playing zombs royale?

[@superpuggus8594]

Lead lol

[@ikky_o7]

Lol

[@danielschaben]

Holy crap. Your a celebrity. I need to get my numbers closer to yours!

[@wigglemaster5202]

@@danielschaben Youre and wdym number

[@blanco-sanchez450]

this was a bitchin' tutorial, thanks.

[@Nocturnal_Ice]

Thank you, fine sir.

[@jacquelinevaliente774]

Amazing!! What a great job at explaining! Bravo and cheers!

[@mustardsauce3917]

I was stuck on this for a good hour until I watched this video, and I got it first try. Thanks a bunch!

[@danielschaben]

Glad I could help!

[@yuushirogane9669]

This was really helpful! I didn't know how to solve it before, and now, I can get in just one try! Thank you so much!

[@bobfranklin8514]

Thank you so much, I have my math final today this really helped me out.

[@elizabethpoole4196]

Thank you so much! I have a test tomorrow and you just saved my butt!

[@richardlol7599]

thank you so much I honestly had the biggest headache doing this. You are a hero.

[@annanguyen5217]

thank you sm :,). before this video i struggled so much i cried at my hw. thank you thank you thank youuuuu

[@arrowlogproductions2509]

Thank you so much I finally understand this!

[@baraaarkawazi4741]

Thank you. This is very helpful.

[@eresdavid]

This was so helpful!

[@Petrichorus-]

Thank you so much! Lol this was so helpful I refreshed to watch the ad

[@roulettegelbolingo2308]

Thank you very much this was very helpful

[@Iamnicknow]

Helped me get an A thank you so much

[@sadat_41]

Thanks a lot 👍

[@Fibblejoe]

Thank you for actually showing how to do it instead of using 0 as one of the x's for an easy variable.

[@danielschaben]

Glad I could help

[@leenooooooooooooooooooo]

Bruv, youve saved ma life dawg, thanks homie i gotta mock exam tomorrow

[@xavierstudios8562]

mate this was so helpful thankyou sooo much, you made it so easy keep it up man.

[@danielschaben]

thanks for the comment. I'm glad I could help!

[@josephcung11]

Wow Thanks that was quite a long steps to follow!

[@homer4590]

I was so close to finding it by myself, thanks for the help! :)

[@danielschaben]

Glad I could help!

[@kaygirlcreator]

Thank you for taking the time to make this video, even if it was a few years ago because this video just saved me with my homework!

[@danielschaben]

You're welcome 😊

[@kaei4806]

@7:59 what if all of my equations are positive? Is there something i need to change?

[@lowinq]

very well explained, thank you !!!!

[@danielschaben]

thanks!!!!

[@whynot3563]

THANK YOU SO MUCH OMG this helped me a lot you are a godsend!

[@danielschaben]

Your welcome glad I could help. Let me know if you need anything specific.

[@AaronBellDeo]

Fantastic tutorial!!

[@danielschaben]

Thanks!

[@ashtonpeterson6265]

Would this work for functions that are not porabolas as well?

[@Drforeverok]

I am sick of doing homework every damn day. I want to enjoy my winter holidays. Sick of these BS teachers to be honest with u. Thank u for this. I understood nothing due to the lack of my brain

[@danielschaben]

Just saw this. I know the feeling. Thanks for the comment

[@Drforeverok]

@@danielschaben oh. I can't belive I wrote this. What a crybaby I was

[@danielschaben]

@@Drforeverok oh no. Math is that way. It takes a while to get past the pain. Lots of practice

[@Drforeverok]

@@danielschaben everything is that way my friend. It takes a lot of practice to get past any obstacle or even being rich! I had a terrible mindset when I wrote this

[@violinwire5007]

You just saved my a** on the last day of the semester. Thanks bro:)

[@danielschaben]

Any time! If you need anymore math help send me a comment. If I have time I will try and help

[@ayoince500]

soooo helpful.

[@jgarrison1309]

At 3:08 what he did there was multiply the bottom equation by -1, and that is allowed, and what you get for your trouble is all the signs change and the coefficients on the C terms are now opposites or additive inverses.

[@taylornight8258]

OMG THANK YOU! He was confusing me but i got it now

[@Appolloscott]

U r awesome

[@josephmanaois9062]

Thanks!!

[@mtc-j9i]

It's the exact same answer if you do a quadratic regression, and it saves a lot of time! But I did enjoy learning this method!

[@arianaramirez7776]

you are the BEST! thank you for this!!!!!!

[@danielschaben]

You're Welcome! Glad it was helpful.

[@tenzinchoedon8207]

This is frickin Life savor

[@nicolaschang6316]

Very helpful

[@gautamputheri4386]

Thank you! Very helpful

[@danielschaben]

You're welcome

[@aagneygorthi2135]

Fantastic video

[@danielschaben]

Thanks

[@peebeeaguirre5858]

Thank you so much this helped a lot

[@danielschaben]

Glad it helped!

[@luqmanalam3100]

oh my thank you so much you saved my compression life

[@danielschaben]

Glad I could help

[@kknowledge1619]

Good Work Sir sir konsa software use karty hain??

[@fionafoxXscourge4eva]

Excuse me, what do I do if one of my sets of points has a 0? for example (0,4).

[@vlogtomejr.1919]

In your case, (0,4) is the y-intercept. Therefore, c=4. Still unsure? Plug it in! f(0)=ax^2+bx+c. Substitute every instance of x with 0. a(0^2)+b*0+c. What's left after this is c. Since f(0)=4 and f(0)=c, then c=4

[@ashok9293]

Hi sir I am from India tq u so much

[@danielschaben]

You are welcome. Glad I could help from Eustis Nebraska

[@nicolepulmones]

ahhh i had hw and forgot how to do this 😭 tysm!

[@danielschaben]

Your Welcome. Glad it was helpful

[@pedroarcos8800]

Yo i have test and now i have confidence that ima pass it

[@klorofyl]

thank you!

[@danielschaben]

You're welcome

[@helloitsme7796]

Him- *sigh* WOW me: I FEEL YOU AHAHHAHAA

[@richardtran4714]

Good video! I’ve been lost on how to do this for a week now and my midterm is next week.

[@SneakyThew]

nicely done, but what about when you can't reduce when you're trying to eliminate a or b. is it protocol to multiply each equation by a different value to achieve the same a or b value?

[@danielschaben]

If we use the method of elimination, then yes we multiply the two equation by the the number required to make the least common multiple of either a or b

[@SneakyThew]

@@danielschaben right on, thanks for the reply + the very helpful video

[@zane5477]

thank you so much

[@danielschaben]

your welcome. let me know if there is another math video you might need

[@vedanttiwary2419]

Thanks

[@fabianussimbili3548]

How can I determine an equation of a line Wich passes through the point 4 ax-axis and 6 y-axis writing it in the form ax+by+c=0? I need help please?

[@danielschaben]

publishing answer now

[@danielschaben]

kzbin.info/www/bejne/kKaVqKJspKiIlac

[@CourtEditz]

why did you at 5 minutes and 15 seconds say to multiply the bottom equation by 3. Where did you get the 3 from thanks.

[@danielschaben]

I multiplied by 3 to match up the variable b in both equations. So then both bs would have a 3 coefficient. The process is the key to eliminating the b variable. If the top equation had a 4b, I would have multiplied by 4.

[@Roman-cu7zh]

What if one of the points is a root-like (30,0) or the origin (0,0). Can I still plug them in?

[@danielschaben]

Zergento Cheeze yes. That actually should simplify things

[@martincarman1725]

Nice, looking back, the top equation could have been reduced by 3 to simplify even further.

[@emily1952]

Omg so helpful, but your telling me it’s gonna take 14 minutes to do one problem....

[@danielschaben]

in this method. Yes.

[@finncox2837]

THANKYOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@danielschaben]

YOURWELCOME!!!!!!!!!!!!

[@rosariawellman4726]

godbless you

[@rashmitshrestha6582]

This is probably a stupid question but does it work with any three random points?

[@danielschaben]

Actually that is an amazing question, and one I have had in the back of my mind, but never spent time exploring. It won't work with any three points because the three points have to form a parabola. So if you used (2,1) (2, 3) (5,7) for instance y = ax^2+bx+c would not work however I think x = ay^2 + by + c would work for those three points. You have me thinking. ... Great question. If you stacked three points it would not work in either case (2, 1) (2, 3,) (2, 4). would not work, or any three collinear points would not work. I don't have time right now to explore much more. But what if the three points lie on a circle? What about three points that lie on a hyperbola or trig function? ohhhh so much we could explore with this seemingly silly question. Good work getting my mind working!

[@rashmitshrestha6582]

@@danielschabenThanks

[@Southern_Yankee]

I love watching different instructors/teachers/professors show the steps in working more complicated algebra topics but I wonder if too much time is spent on the basic arithmetic. If someone is learning algebra and doesn’t get eliminating or moving variables and constants in the solution process then maybe they should be watching basic math videos first. It really slows down the instruction. Just an observation.

[@danielschaben]

I really only make these videos for my students. They will watch them mainly as more practice for those that need it. A way of studying for the test. I only threw them up here as a free place to store them back in 2010. Had no idea that anyone else would even find them valuable. Wish I had time to make more.

[@Fremdscham-uu3xv]

god bless you but what happens if I get numbers such as 0.55? Because your tutorial works bad at this case A (-2/22) B (1/7) C (3/2) and at the end, my results are a bit different than the 3 given points like if I use B I get 6.98 instead of 7 or 22,87 instead of 22

[@danielschaben]

do you mean (-2,22) for point A, (1,7) for point B and (3,2) for point C?

[@Fremdscham-uu3xv]

@@danielschaben yes

[@danielschaben]

I'll work on it. wish I had my video equipment right now

[@danielschaben]

near as I can tell. havent checked my answer. but a = 0.5, b= -4.5, and c = 11. so the quadratic would be y = 0.5x^2 - 4.5x + 11

[@danielschaben]

I can make a video in about 5 hours. in parent teachers conferences now. so trapped in meetings

[@wk4799]

this will help m PSMT thanks pookie

[@mosesmbundu7103]

Ok understand

[@asddef4886]

Any Javascript function or library that can do this for me.

[@danielschaben]

Lots of them. Wolfram alpha 3 equation 3 unknown calculator is one I've used. Although when you get into linear algebra and start representing these with matrices there becomes many ways to do it with matrix capable calculators

[@nathanaellandicho]

You could've just divided the other equation by 3 so that the b would have no coefficients

[@jgarrison1309]

Yes! He caught one shortcut, but not the second. He could have pounced at 5:15 Ugh! :-)

[@patrciaclemons8183]

KZbin should award me my PhD. It's a million times more efficient than learning in college.

[@danielschaben]

Yes. Everything is here.

[@weirdzfully]

Is this Gauss elimination?

[@danielschaben]

It is only without the fancy matrices.

[@peep0le282]

wait what if the value of a and b is one and you negate those two, it will be cancelled along with C, help?

[@danielschaben]

I would have to see your problem. but if a=1 , b=1, and c =0. then the equation is y = x^2 + x

[@peep0le282]

@@danielschaben like this, Y=a(1) +b(1) +c Y=a(1)+b(1)+c If you negate all, well you cancel all

[@danielschaben]

@@peep0le282 give me your three ordered pairs

[@danielschaben]

@@peep0le282 you need to sub for y as well.

[@warpromo6636]

When you are a sixth grader and you have to do this again about 5 times for 5 different problems.

[@warpromo6636]

Screw advanced math :(

[@danielschaben]

Consider yourself lucky. I've seen 30 year olds cry doing this stuff. If your a 6th grader and have a handle on it. I expect nothing less than you creating your own space company and the next mission to Europa (one of Jupiter's moons) :) Thanks for the comment and good luck. What starts out at drudgery could turn into the next thing that changes the world. You never know.

[@warpromo6636]

Oh lol, never thought of it that way, thank you, this has encouraged me to work harder.

[@arjunyeleshwarapu]

When you’re a 9th and have to do 5 of these problems in 7 minutes

[@saintedwarrior5599]

does a always be 1

[@danielschaben]

No. But often it is on highschool homework to make the problems easier

[@pjgenta3902]

Yo dis nigga Andy Bernard

[@ashishpohwani3153]

e

[@KhurshidAlam-qm3fx]

there is so much room for error, im going to fail

[@danielschaben]

It's a lot to remember, just remember that showing work helps. I hardly ever downgrade for silly errors. If your logic is sound, I am usually pretty happy.

[@arjunyeleshwarapu]

searching4math meanwhile my math teacher gave me a D+ on my quiz because my answer came out positive instead of negative, and didn’t mention something that wasn’t asked in the question

[@danielschaben]

@@arjunyeleshwarapu ya I'm sorry. It's so aggravating when you understand it and then minor errors hold us up.

[@gabriellegarcia2503]

Too much damn work I’m just gonna fail.

[@danielschaben]

Don't give up man! You can do it! If I can learn this anyone can!

[@nickyboi3292]

this shit aint shit

[@kyleresnick842]

Awful explanation for something rediculously easier

[@biguglybucker]

you realize this is so other people can fully learn the topic right? people who already know how to do it don't come here