# Math Help - Algebra

1. ## Algebra

x power 4 -(x-z)whole power 4.
Factorisation

2. Originally Posted by shaurya
x power 4 -(x-z)whole power 4.
Factorisation
I guess that you are expected to use the difference of two squares result
here:

$u^2-v^2=(u-v)(u+v)$.

Here you have:

$x^4-(x-z)^4$.

Now use $x^2$ for $u$ and $(x-z)^2$ for $v$, this will give you the first stage
of factorisation. The difference of squares can then be applied again to further.
factorise the expression.

RonL