# Definition:Quadratic Equation in Two Variables

## Definition

A quadratic equation in $2$ variables is an equation of the form:

$a x^2 + b y^2 + 2 h x y + 2 g x + 2 f y + c = 0$

where $x$ and $y$ are independent variables.

## Also known as

A quadratic equation is also known as:

• an equation of the second degree
• a polynomial of degree $2$

and so on.