Question

Take index = 2. Does this mean the radicand is a square of some number? If yes, is there any number whose square is a negative number? If not, can the radicand be negative?

Answer 1

the square of complex no. can be negative

Answer 2

what would be a good example of this?

Answer 3

2^2=4
(2i)62=-4

Answer 4

(2i)^2*