Question

Factorise: x square -11x -42​

Answer 1

Step-by-step explanation:

${x}^{2} - 11x - 42 \\ = {x}^{2} - (14 - 3)x - 42 \\ = {x}^{2} - 14x + 3x - 42 \ \\ = x(x - 14) + 3(x - 14) \\ = (x - 14)(x + 3)$