I have

$\displaystyle \frac{1}{(x-1)^2}$

And to solve a binomial problem I need the x part in form (1 +/- x) - ie I need a positive 1.

I can get to:

$\displaystyle \frac{1}{(-1(1-x))^2}$

But how can I remove one bracket so I am left with one bracket? The squaring makes it positive so am a bit stuck.

Angus