Simplify the following surds : 168 - Vidyadip

Question

Simplify the following surds : $\quad \sqrt{168}$

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Answer

$\quad \begin{aligned} \sqrt{168} & =\sqrt{4 \times 42} \\ & =\sqrt{4} \times \sqrt{42} \\ & =2 \sqrt{42}\end{aligned}$

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