# How do you simplify the product (x - 9)(3x + 5) and write it in standard form?

Sep 5, 2016

$3 {x}^{2} - 22 x - 45$
$\left(x - 9\right) \left(3 x + 5\right)$
$= x \left(3 x + 5\right) - 9 \left(3 x + 5\right)$
$= 3 {x}^{2} + 5 x - 27 x - 45$
$= 3 {x}^{2} - 22 x - 45$