Quadratic

Completing the square rewrites a quadratic expression ax² + bx + c in the form a(x + p)² + q. This technique is used to solve quadratics, find the vertex of a parabola, and derive the quadratic formula.

The discriminant of a quadratic equation determines how many and what type of roots the equation has.

The quadratic formula solves any quadratic equation ax² + bx + c = 0 by finding the roots in terms of a, b, and c.