# How do you simplify 4 sqrt 3 + 2 sqrt 27 - 4 sqrt 18?

$4 \sqrt{3} + 2 \sqrt{3 \cdot 9} - 4 \sqrt{9 \cdot 2} = 4 \sqrt{3} + 6 \sqrt{3} - 12 \sqrt{2} =$
$= 10 \sqrt{3} - 12 \sqrt{2} = 2 \left(5 \sqrt{3} - 6 \sqrt{2}\right)$