Question

What is the square root of -4

Answer 1

2i

Answer 2

okay
how sure are u Raphael??

Answer 3

Oh yes nice problem
\(\sqrt{-4}=\sqrt{-1}\times\sqrt{4}=\sqrt{-1}\times2\)
Therefore we take \(\sqrt{-1}\) as iota \(i\)

Therefore \(\sqrt{-4}=2i\)

Answer 4

square root of -1 is "i"

The definition of the square root of -1 is i, and i^2 ( "i squared") is negative 1.

Answer 5

You are a genius @TheViper

Answer 6

I'll second that...