In mathematics, the

**cube root**of a number is a number which, when cubed (multiplied by itself and then multiplied by itself again), gives back the original number. For instance, the cube root of 8 is 2, because 2 × 2 × 2 = 8. This is written:

*x*is a real (correspondingly, complex) solution

*y*to the equation:

- y
^{3}= x,

For instance, the cube roots of unity are 1, (− 1 + √3*i*)/2 and (− 1 − √3*i*)/2 .

See also: