Question

factorise x^3-2x^2-x+2​

Answer 1

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• Factorise the polynomial.

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${x}^{3} - 2 {x}^{2} - x + 2$

$= {x}^{2} (x - 2) - 1(x - 2)$

$= ( {x}^{2} - 1)(x - 2)$

$= (x + 1)(x - 1)(x - 2)$

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• $(x + 1)(x - 1)(x - 2)$