# How do you simplify sqrt18 + 2sqrt2?

$\sqrt{18} + 2 \sqrt{2} = \sqrt{{3}^{2} \cdot 2} + 2 \sqrt{2}$
$= \sqrt{{3}^{2}} \sqrt{2} + 2 \sqrt{2}$
$= 3 \sqrt{2} + 2 \sqrt{2}$
$= \left(3 + 2\right) \sqrt{2}$
$= 5 \sqrt{2}$