# How do you simplify sqrt(168)?

Jul 2, 2016

=$2 \cdot \sqrt{42}$

#### Explanation:

First factorize the given no $168$.

$168$ can be written as $\left(169 - 1\right)$ =>

$168$ can be written as $\sqrt{{13}^{2} - {1}^{2}}$ => $\sqrt{12 \cdot 14}$

=$2 \cdot \sqrt{6 \cdot 7}$ = $2 \sqrt{42}$