Question

Factorise 3 X cube + 5 X square - 16 X - 2​

Answer 1

Step-by-step explanation:

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

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