# Quadratic Equations

Quadratic equation is a polynomial equation of the second degree. The general form is

*ax*+^{2}*bx*+*c*= 0 where a â‰ 0. (For a = 0, the equation becomes a linear equation.)The letters a, b, and c are called coefficients: the quadratic coefficient a is the coefficient of x

^{2}, the linear coefficient b is the coefficient of x, and c is the constant coefficient, also called the free term or constant term.