Question

What is the square root of a negative number?

Answer 1

Imaginary.

Wanna know why?
Because, square roots of imaginary numbers cannot be represented on the usual, cartesian xy-plane. They can be represented on a more special plane called the argand plane.

\[\sqrt{-1} = i\]

Answer 2

Thanks! This helped so much! My teacher is such an idiot! I asked him and said that he doesn't know but he expects us to know! Thanks so much!!!

Answer 3

He seriously said he don't know?

Answer 4

@geerky42 ya! He's an retrice

Answer 5

Everyone has teachers like that. But it'd be wrong to term anyone an idiot.