# Definition:Quadratic Function

## Definition

A **quadratic function** is an expression of the form:

- $\map Q x := a_0 + a_1 x + a_2 x^2$

where $a_0, a_1, a_2$ are constants.

The domain of $x$ is usually defined as the real numbers $\R$ or the
complex numbers $\C$.

## Also see

- Results about
**quadratic functions**can be found here.