whats the square root of -7

This is an IMAGINARY NUMBER answer.

YOU CANNOT MULTIPLY ANY REAL NUMBER BY ITSELF AND GET A NEGATIVE ANSWER.

THAT IS IMPOSSIBLE!

A negative times a negaive = a positive     !!

A positive times a positive = a positive      !!

$${\sqrt{-{\mathtt{7}}}} = {\mathtt{2.645\: \!751\: \!311\: \!064\: \!590\: \!6}}{i}$$

$${\sqrt{-{\mathtt{7}}}} = {\mathtt{2.645\: \!751\: \!311\: \!064\: \!590\: \!6}}{i}$$