Is it possible to take the square root of a negative number?

Well Yes And No. In Mathmatics There Is A "Parrallel" Universe Called Imaginary. Take -16. the answer is 4i. But Why? Because. 4x-4=-16 But These Two Numbers Arnt The Same Because Ones Negative And Ones Positive. Since -16 = (-1) 16. We Can Do This. The Square Root Of -16 Is -1x-1x16. -1x-1=i.