# How do you simplify sqrt 18 - sqrt 50?

##### 1 Answer

It is

$\sqrt{18} - \sqrt{50} = \sqrt{2 \cdot {3}^{2}} - \sqrt{2 \cdot {5}^{2}} = 3 \cdot \sqrt{2} - 5 \sqrt{2} = - 2 \sqrt{2}$