Completing the Square and Vertex Form, Step by Step
Learn how to complete the square to write a quadratic in vertex form a(x − h)² + k, find the vertex, and see why it matters for graphs.
Tagged: quadratics
3 guides.
Three Ways to Solve a Quadratic Equation
Solve quadratic equations by factoring, the quadratic formula and completing the square, with worked examples and tips on choosing a method.
What Is the Discriminant? Reading a Quadratic at a Glance
The discriminant b² − 4ac tells you how many roots a quadratic has and what kind they are. Learn to use it with clear examples.