Quadratic Formula

The Quadratic formula returns the x-intercepts of a quadratic equation. The formula is useful when the quadratic equation cannot be easily factored by hand. The result of the formula can be visualized as the roots or the x-intercepts of the parabola:

Quadratic Formula

Derive Quadratic Formula

To derive the quadratic formula, start with the general form of the quadratic equation set equal to zero and solve for the variable x.