# Math Help - Factorisation

1. ## Factorisation

Factorise the following:
2(x - 1)² - 9(x - 1) - 5

2. Originally Posted by beefsupreme

Factorise the following:
2(x - 1)² - 9(x - 1) - 5
Substitute $(x-1)=y$

$2y^2-9y-5 = (2y+1)(y-5)$

Now re-substitute to get the final result.