What is the square root of 20?

$${\sqrt{{\mathtt{20}}}} = {\mathtt{4.472\: \!135\: \!954\: \!999\: \!579\: \!4}}$$

Maybe you just want to simplify it?

$$\sqrt{20}=\sqrt{4*5}=\sqrt4*\sqrt5=2\sqrt5$$

Thanks, guys. - Jessica, person who posted question.