In
mathematics, a
cube root of a number
x is a number
a such that
a3 =
x. All
real numbers (except zero) have exactly one real cube root and a pair of
complex conjugate cube roots, and all nonzero
complex numbers have three distinct complex cube roots. For example, the real cube root of 8, denoted , is 2, because 2
3 = 8, while the other cube roots of 8 are -1 +
i and -1 -
i. The three cube roots of -27
i are