# Simplifying Radicals

To square a number means to raise it to the second power- that is, to use the number as a factor twice. Finding square root is an opposite operation of squaring.

A square root of a number is one of its two equal factors. Thus $3$ is a square root of $9$ because $3 \times 3$ = $9$. likewise, $-3$ is also a square root of 9 because $(-3) \times (-3) = 9$. In general , $a$ is a square root of $b$ if $a^{2}$ = $b$.

The symbol $\sqrt{}$ called the radical sign which is used to designate square root. The number under the radical sign is called the radicand.

The entire expression such as $\sqrt{9}$ is called a radical. $\sqrt [n]{a}$ denotes the n

The entire expression such as $\sqrt{9}$ is called a radical. $\sqrt [n]{a}$ denotes the n

^{th}root of given number $a$.