Question

factorise x^3-2x^2-x+2​

Answer 1

Answer:

${x}^{3} - 2 {x}^{2} - x + 2 \\ = {x}^{2} (x - 2) - 1(x - 2) \\ = ( {x}^{2} - 1)(x - 2) \\ = (x + 1)(x - 1)(x - 2)$

Answer 2

Answer:

(x−2)(x+1)(x−1)

Explanation:

Add and subtract the second term to the expression and factor by grouping.