factorization of polynomials

[agnes]

(3x-y)^2-(y-x)^2
I dont get the first step i know what formula to use.

 

[JeffM]

(3x-y)^2-(y-x)^2
I dont get the first step i know what formula to use.

You do not explain to us what exactly the problem requires you to do, nor what you have tried. Without that, there is very little help we can give you because we do not know whither you are going or where you are stuck.

Here is a potentially helpful hint:

Difference of squares: \(\displaystyle a^2 - b^2 = (a - b)(a + b).\)

 

[mmm4444bot]

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