#### Answer

The square root of $n$, represented by $\underline{\sqrt{n}}$, is the nonnegative number that when multiplied by itself gives $\underline{n}$.

#### Work Step by Step

The square root of $n$, represented by $\underline{\sqrt{n}}$, is the nonnegative number that when multiplied to itself gives $\underline{n}$.
$\sqrt n*\sqrt n=n$