# How do you multiply (x-4)(x+8)?

Aug 2, 2015

$\left(x - 4\right) \left(x + 8\right) = {x}^{2} + 4 x - 32$

#### Explanation:

Use the FOIL method which shows the order of multiplication of the terms. Then add like terms.

$\left(x - 4\right) \left(x + 8\right) = \left(x \cdot x\right) + \left(x \cdot 8\right) + \left(- 4 \cdot x\right) + \left(- 4 \cdot 8\right)$ =

$\left(x - 4\right) \left(x + 8\right) = {x}^{2} + 8 x - 4 x - 32$ =

$\left(x - 4\right) \left(x + 8\right) = {x}^{2} + 4 x - 32$