Relationship between roots and coefficients of a quadratic equation (1) : ExamSolutions Maths

[@PreetKaur-ch7gk]

Was badly in need of this...as coudnt find better way of explaining...anywhere....thnxx a bunch...nd be blessed...!!

[@lingmeowww1147]

My teacher never explain how we get alpha plus beta=-b/a. She let us memorized all these things. That y i dont like math. Thanks u really save me

[@idrislangston882]

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[@manuelfalzoialcantara92]

Thanks very much Mr Stuart Sidders, excellent video. This tutorial is a remarkable of this identification method by comparing two equations, one of them expanding and other factoring form. From this theorem we can building up one equation from other equation, based on coefficients. I love your tutorial video, thanks very much!

[@marshadmostafa2270]

Yo i dont need school. You saving peoples’ live. Thank you so much.

[@claire8120]

Thank you so much! Without you, I’ll just be sitting there, clueless!

[@XxFarnawanyxX]

Thanks a lot man !

[@martinsiachuka5243]

Sorry If you could kindly help me when rearranging so as to get alpha squared plus Betta squared WHY is the two alpha times Betta change to a negative instead of it maintaining it's positive.

[@simons2006]

Look at the formula above: (a+b)²=a²+2ab+b². But we want only a²+b² (notice that a²+b² is not the same as (a+b)²), so we substract 2ab to get just a²+b². So (a+b)²-2ab=a²+b².

[@martinsiachuka5243]

@@simons2006 Cheers ✌️

[@mehlulidzimba8000]

​@@simons2006best explanation

[@swatibhoite9333]

Very nice explanation

[@FasAntick]

where can i find a proof for the first three lines???

[@caz4800]

Whut about the -3, since its is negative in the formula, why isnt the negative sign there as you solved

[@kpoglu5063]

The formula says (-b /a) but since b is already -3 then it comes out (--3/1) =(3/1) =3

[@mitchellugiagbe8584]

Thanks a lot

[@ExamSolutions_Maths]

Thank you for watching. I am pleased you got something from it.

[@delibenny3147]

Niiiiceeee thank you very much

[@420supremacymaybe4]

why did when you make the (a+b)^2 the subject you subtract the 2ab

[@calvinodhiambo9041]

Very helpful 👍👍

[@ironixmedia8121]

This is very helpful. I have a question, In 5:50, Why did we put a negative sign before 2αβ? I thought it was supposed to be (α+β)²+2αβ.

[@ExamSolutions_Maths]

We subtracted 2αβ from both sides to make α^2 + β^2 the subject.

[@manuel4real664]

nice video...😊😊😊😊

[@stanlydy323]

tomorrow is my report and tf

[@aberedenisiokou2929]

Thanks sir

[@ExamSolutions_Maths]

All the best

[@vaibhavbohra4308]

Nice video

[@alster724]

Simply (a+b)²= 9 9=a²+2(-5)+b² a²+b²=19

[@samisiddiqi5411]

I'm curious. Can this work out roots for higher powers? When does it not work?

[@darcylim6037]

im not quite sure on when it doesnt work

[@ramisamaliat2536]

a+B = - b/a and aB = c/a

[@riedhoanrefaz1786]

Guys can you help me were to find quadratic equations alpha beta question paper solving edexcel o levels

[@ariaahmed3130]

Assalamualaikum. You can try searching up edexcel igcse past papers, or search the topic questions and it should come up on google, hope it helps .

[@esimonezegiovanni]

I AM NOT BLIDE

[@mutintasililo]

This is very helpful but why do we still have the negative two alpha beta? 🤔 I thought you subtracted it from the positive two alpha beta?

[@kpoglu5063]

Mathematically (a+b)^2 =(a^2)+(2ab)+(b^2) Making (a^2)+(b^2) the subject Gives (a+b)^2 -2ab

[@coolguy7461]

ty

[@faithjbarnett]

this was a life saver thanks sooooooo much

[@ExamSolutions_Maths]

No problem - Thanks for watching.

[@mostafatifo4006]

Thanks a lot ❤️❤️

[@ExamSolutions_Maths]

Thanks for watching.

[@Leo.385]

The good teachers are now in youtube ffs 😒

[@waitwhat._]

thanks I wish I could double like it 😂

[@AliSaleh-of1ul]

Mantap

[@meroosawah7000]

Wow!!!!!

[@lorenzomanansala9390]

Shoubout po sa LUKE 2020-2021

[@RacingEnigma]

Why do you divide the equation by "a"

[@sohaahmed5658]

because the coefficient of x squared is a so we divide the whole equation by a. If there was any other number, say 2, then we will divide the equation by 2

[@sohaahmed5658]

lol I just saw ur comment was 3 yrs ago

[@Ron-ls6ob]

Umm it’s -3 I suppose?

[@beastindianfamily7414]

bhai -3 ayga

[@joyquijano1183]

nakakabobo yung math😊

[@noviebaloney]

share mo lang?

[@damnbro7770]

Wow these are rude comments

[@lorenzomanansala9390]

Hi po

[@YuanChristopherLTan]

Ano grade mo pre

[@justincharlesdemegillo5804]

you know that its beta NOT BITA!

[@salimrabah6784]

Its how you pronounce it in the UK, Beta is pronounced with a hard E in America

[@eternyte688]

ur dumb aren't ya? It's their pronunciation.