When the radical symbol is used without an "index" indicated, it is implied to be the "square root" of a value.
Otherwise, the
type of "root" is determined by the appearance of the "index" value.
If the index is an odd number, the radicand can be a negative value.
Raising a negative real number to an odd power will result in a negative value.
(-2)(-2)(-2)(-2)(-2) = -32
If the index is an even number, the radicand can not be a negative value.
It is not possible to raise a negative real number to an even power and get a negative value.
(Note: Our work in this unit is dealing with real numbers, not complex numbers.)