Learn how to solve quadratic equations using the quadratic formula , factoring, completing the square, and graphing. Find out what the discriminant is and how it affects the solutions. Quadratic Equations It is a quadratic equation when it can be put in the form ax2 + bx + c = 0, and a is not zero: The name comes from "quad" meaning square, as the variable is squared (in other words x2). These are all quadratic equations in different forms: Quadratic formula The quadratic formula is a formula used to solve quadratic equations . It is the solution to the general quadratic equation . Quadratics are polynomials whose highest power term has a degree of 2. General quadratic equation : Quadratic formula : a, b and c are constants, where a cannot equal 0. The ± indicates that the quadratic formula has two solutions. Each of these is referred to as a root. Geometrically, these roots represent the points at which a parabola crosses the x ... The quadratic formula is used to find the roots of a quadratic equation and these roots are called the solutions of the quadratic equation . However, there are several methods of solving quadratic equations such as factoring, completing the square, graphing, etc.
