Question

- - 2x² – 15x – 7 factorise​

Answer 1

SOLUTION

$- 2x {}^{2} - 15x - 7 \\ = - (2x {}^{2} + 15x + 7) \\ = - (2x {}^{2} + 14x + x + 7) \\ = - (2x(x + 7) + 1(x + 7)) \\ = - (2x + 1)(x + 7)$

Answer 2

Answer:

$\begin{lgathered}- 2x {}^{2} - 15x - 7 \\ = - (2x {}^{2} + 15x + 7) \\ = - (2x {}^{2} + 14x + x + 7) \\ = - (2x(x + 7) + 1(x + 7)) \\ = - (2x + 1)(x + 7)\end{lgathered}$