Question

find out the correct value of under root minus 4?
$\sqrt{ - 4} =$

Answer 1

$\sqrt{-4}$


=> $\sqrt{(-1)4}$


=> $\sqrt{(2^{+2})4}$


=> $\sqrt{2i}^{2}$


=> 2i




$\therefore{}$ The value of $\sqrt{-4}$ is $2i$

Answer 2

To Find :

The correct value of
$\sqrt{ - 4}$
Solution :

$\sqrt{ - 4} \\ \sqrt{( - 1)4} \\ \sqrt{ {2}^{ + 2} } \\ \sqrt{ {2i}^{2} } = 2i$
The required value of √4 = 2i .

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