## anonymous 4 years ago What is the square root of -4

1. anonymous

2i

2. anonymous

okay how sure are u Raphael??

3. TheViper

Oh yes nice problem $$\sqrt{-4}=\sqrt{-1}\times\sqrt{4}=\sqrt{-1}\times2$$ Therefore we take $$\sqrt{-1}$$ as iota $$i$$ Therefore $$\sqrt{-4}=2i$$

4. anonymous

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

5. anonymous

You are a genius @TheViper

6. anonymous

I'll second that...