Question

Find the factors.

(3) x² + 3x – 40

Answer 1

The factors of x² + 3x – 40 are:

$$\begin{gathered} x^2+3x-40 \\ =x^2+8x-5x-40 \\ =x\left(x+8\right)-5\left(x+8\right) \\ =\left(x+8\right)\left(x-5\right) \end{gathered}$$