# What is the principal square root of 4900?

May 19, 2016

70

#### Explanation:

None negative square root -> principle square root.

$4900 \to {7}^{2} \times {10}^{2}$

$\implies \sqrt{4900} = \sqrt{{7}^{2}} \times \sqrt{{10}^{2}}$

$7 \times 10 = 70$