# How do you simplify sqrt 18 + sqrt(4y^3) - 2 sqrt(y^3) - sqrt(48y^2)?

$\sqrt{18} + \sqrt{4 {y}^{3}} - 2 \sqrt{{y}^{3}} - \sqrt{48 {y}^{2}}$
$= 3 \sqrt{2} + 2 y \sqrt{y} - 2 y \sqrt{y} - 4 y \sqrt{3}$
$= 3 \sqrt{2} - 4 y \sqrt{3}$