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

If the radicand is a negitive number disregard the - sign and automaticaly pull an i out of the equation indicating that the number is now in the imaginary number system

Answer 2

yes, it means that the radicand is the square of some number. yes, the square of an imaginary number is i is -1

Answer 3

then just solve the rest of the radicand like you normally would

Answer 4

http://en.wikipedia.org/wiki/Imaginary_number

Answer 5

Thank you all so much...I think I understand better.