# Root

A root of a polynomial function, f, is just a solution to the equation f(x) = 0, that is an input that yields an output of 0.

The Nth root of a number, is that which when multiplied by itself N times produces the desired number. The square root or 2^{nd} root of 4 is 2 (2 x 2 = 4). The cube (3rd) root of 27 is 9 (3 x 3 x 3 =9).

**See also: **Cubic Equation, Polynomial, Quadratic Equation.

**Subjects: ** Mathematics