Question

root of -1 is i ,then i^2= -1.But i^2=whole root of -1*-1,and -1*-1 will become +1 no.I know that if 2 same numbers inside sq root may taken out as one,but inside whole root of -1*-1 it will become root of 1 no .please explain hope it will understand.

Answer 1

whole root of -1*-1 is not same as root of -1*root of -1.
It is because whole root of -1*-1 is same as square root of 1 .
square root of 1 is plus one or minus one..two values can be possible...so it cannot be possible. I think you got the idea.