# How do you factor x² + 2x -8?

$\left(x + 4\right) \left(x - 2\right)$
$\text{the factors of - 8 which sum to + 2 are + 4 and - 2}$
$\Rightarrow {x}^{2} + 2 x - 8 = \left(x + 4\right) \left(x - 2\right)$