# How do you factor x²+9x+18?

$\left(x + 3\right) \left(x + 6\right)$
$\text{using the a-c method to factor the quadratic}$
$\text{the factors of + 18 which sum to + 9 are + 3 and + 6}$
.$\Rightarrow {x}^{2} + 9 x + 18 = \left(x + 3\right) \left(x + 6\right)$