If the cube of a number x is equal to a, that is, the fifth power of x is equal to a (x^5=a), that is, 5 xs multiplied consecutively equal a, then this number x is called the fifth root of a.

Any number has exactly five cube roots, evenly distributed around the origin.⁵=a, then x is called the fifth root of a. 0 is the fifth root of 0.