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

anyone know the answer?

Answer 2

- If the index = 2, it's showing that you that the value is a square root (vice a cube root or something higher).

- Any number squared will give you a positive value simply because any negative number times another negative number = a positive number.

- The radicand can be negative but at that point you're dealing with an "imaginary" number (which is a real term and has uses).