# How do you find the product of (2x-9)(2x+4)?

Jul 13, 2016

$2 {x}^{2} - 10 x - 36$

#### Explanation:

Given -

$\left(2 x - 9\right) \left(2 x + 4\right)$

$\left(2 x \times 2 x\right) - \left(9 \times 2 x\right) + \left(2 x \times 4\right) - \left(9 \times 4\right)$
$2 {x}^{2} - 18 x + 8 x - 36$
$2 {x}^{2} - 10 x - 36$