Definition:Quadratic Equation in Two Variables

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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.

Also see

  • Results about quadratic equations can be found here.