Question

Find the square root of $21$

Answer 1

Solve for the square root of given number

Given number is $21$

$\therefore$By prime factorization,

$21=7\times 3$

Taking Square root on both sides

$\Rightarrow \sqrt{21}=\sqrt{7\times 3}$

$$\begin{gathered} =\sqrt{7}\times \sqrt{3} \\ =1.7320X2.6457 \end{gathered}$$

$\therefore \sqrt{21}=4.5823$

Hence, the value of $\sqrt{21}$ is $4.5823$.