Here's the question you clicked on:
bthemesandtricks
What is the square root of -4
okay how sure are u Raphael??
Oh yes nice problem \(\sqrt{-4}=\sqrt{-1}\times\sqrt{4}=\sqrt{-1}\times2\) Therefore we take \(\sqrt{-1}\) as iota \(i\) Therefore \(\sqrt{-4}=2i\)
square root of -1 is "i" The definition of the square root of -1 is i, and i^2 ( "i squared") is negative 1.
You are a genius @TheViper