Question

Factorise x³-2x²-x+2

Answer 1

$- {x}^{2} ( - x + 2) - x + 2 \\ (- x + 2)( - {x}^{2} + 1)$
hence (2-x) (1-x)(1+x) is the factorised form of given question

Answer 2

X3-2x2-x+2
=x2(x-2)-1(x-2)
=(x2-1)(x-2)