- The definition of a quadratic equation is one in which one of the terms is raised to the second power (squared).
An example of a quadratic equation is 2x² + 4x + 4.
Algebra an equation in which the second power, or square, is the highest to which the unknown quantity is raised
An equation that employs the variable x having the general form ax2 + bx + c = 0, where a, b, and c are constants and a does not equal zero; that is, the variable is squared but raised to no higher power.
(plural quadratic equations)
- (mathematics) a polynomial equation of the second degree.