A solution to an equation of
the form f(x) =
0. Roots may be real or complex.
Note: The roots of f(x)
= 0 are
the same as the zeros of the function f(x). Sometimes
in casual usage the words root and zero are
The roots of x2 – x – 2
= 0 are x = 2 and x = –1.
The equation is satisfied if we substitute either x =
2 or x = –1 into the equation.