Question

factorise x^3-3x^2-9x-5

Answer 1

Hi mate here is the answer:-✍️✍️

$x {}^{3} - 3x {}^{2} - 9x - 5 \\ = x {}^{3} + {x}^{2} - 4 {x}^{2} - 4x - 5x - 5 \\ = {x}^{2} (x + 1) - 4x(x + 1) - 5(x + 1) \\ = (x + 1)( {x}^{2} - 4x - 5) \\ = (x + 1)( {x}^{2} - 5x + x - 5) \\ = (x + 1)(x - 5)(x + 1)$

Hope it helps you ❣️☑️☑️☑️