# How do you simplify ( 3 - 2sqrt2 )^2?

$\textcolor{w h i t e}{\text{XXXX}}$${\left(a - b\right)}^{2} = {a}^{2} - 2 a b + {b}^{2}$
$\textcolor{w h i t e}{\text{XXXX}}$${\left(3 - 2 \sqrt{2}\right)}^{2} = 9 - 12 \sqrt{2} + 8$
$\textcolor{w h i t e}{\text{XXXX}}$$\textcolor{w h i t e}{\text{XXXXXXX}}$$= 17 - 12 \sqrt{2}$