Question

x³ - 3x² – 9x-5 factorise this ​

Answer 1

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