Question

factorise

$x {}^{3} + 13 {x}^{2} + 32x + 20$

Answer 1

$x {}^{3} + 13 {x}^{2} + 32 {x}^{} + 20 \\ {x}^{3} + {x}^{2} + 12 {x}^{2} + 12x + 20x + 20 \\ {x}^{2}(x + 1) + 12x(x + 1) + 20(x + 1) \\ (x + 1)( {x}^{2} + 12x + 20) \\ (x + 1)(x + 10)(x + 2)$