Factorising cubic functions: The kx method

A tutorial on how to factorise polynomials of degree 3 (cubic functions). This video will cover the more popular of the two methods: the "kx" method.

[sibongilemakhanya]

But I love how he says we can just guess 😍🙌😊

[emmanuelchichichi]

Dude!!! I been looking for this method for so long.

[jjj-g]

can someone help me clarify why do you only use (x-1)?

[ahmedghadhi]

But finally you have not solved the equation : x^3 - 4x^2 - 2x - 8 =0, why ??

[suyashkhobragade]

Your indian, why this accent? Views? Bhai tune bagvan ka rasi banda hai right hand meh


Edit : minus not negetive, I can bet your indian haha, bhai kajab accent banaya, aabhi kya scam company meh kam karte ho 😂😂 jokingly.


Edit 2: I don't know if you would read this, 4yrs huh.., I didn't find this kind of video in whole YouTube. Their are cubic equations to factorise but all factorise it to =0 putting values for x. I have the equation without getting factorised, and was searching for this in YouTube for 1/1/2 hrs. Thank you so much for clearing my doubt.❤️

[golddddus]

1 0 -4 3 Synthetic division is the shortest way.
1 1 1 -3
1 1 -3 0 (x-1)(x^2+x-3)=0

[EmpyreanLightASMR]

this is almost asmr to listen to 😂 I wanted to remember how to factor a fifth degree polynomial by hand and this was the last step... and a cool additional technique to the synth division.

[dana]

10 minutes to do just this? Good luck on a test.

[ZaraKhan-hu]

You should have to learn how to teach or speak....It looks like you teach yourself...🙄😡

[briangan]

What if there's no x term? What if it's an expression like 102x³+30x²-450=0

[loveofaflower]

Oh my gosh- you are so good at explaining and teaching ahhhh!! I love you so much!!! Thank you for this <3333 I look foreword to more of your amazing videos!! 😍😍😍

[great]

easiest and simplest method there is. everyone like this vid so more people will see this easy af method

[Circa]

Wait ?! Wait?! his first step was guess what would =0. How is that a step? Guess?!!

[mikehenry]

Why did he change the problem not ise the one that was first on the screen...??

[sarataib.]

I want help solving this ((-2x^4)+x^3 _3x _1)^3 please 🥺

[rockstar]

Shortcut to K: ax^3 + bx^2 + cx + d =0

If the root is positive, -[ c + d*(root) ] =K
If the root is negative, c - d*(root) =K

If the root is positive/negative, b + a*(root) =K

[kittycatcrunchie]

Thank you so much! I wasn't listening in AP Maths when my teacher explained this because I usually use synthetic division, so I'm super grateful that you explained this! :DDD

[aldritzbryancabrera]

Nice! We are already discussing it in integral - partial fraction, yet I do not know what this method is called. Thankfully, you are here!

[domjones]

I was surprised when this worked out. Thanks for this!

[techbeastt]

You made the bridge to overcome the problem 🙏