quadratic science definition

Relating to a mathematical expression containing a term of the second degree, such as x² + 2.
♦ A quadratic equation  is an equation having the general form ax² + bx + c = 0, where a, b, and c are constants.
♦ The quadratic formula  is x = -b ± √(b² - 4ac)/2a. It is used in algebra to calculate the roots of quadratic equations.