Question

what is
$\sqrt - 4$
square root of -4 ​

Answer 1

Here is your solution buddy:-

$\sqrt{ - 4} = \sqrt{4} \times \sqrt{ - 1} \\ \\ now \: \: \sqrt{ - 1} = i \: \: (iota) \\ \\ so \\ \\ \sqrt{ - 4} = \sqrt{4} i \\ \\ = 2i$

Hope it helps.