# Quadratic Equation

A quadratic equation is a polynomial equation in a single variable containing the square of the variable, but no higher powers.

Quadratic equation is a high school-level concept that would be first encountered in an algebra course. It is listed in the California State Standards for Algebra I.

### Prerequisites

Polynomial: | A polynomial is a mathematical expression involving a sum of powers in one or more variables multiplied by coefficients. |

Root: | For a mathematical function, a root is a set of arguments for which the function assumes the value of zero. |