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Completing the square and the quadratic formula
You're already familiar with factoring quadratics, but have begun to realize that it only is useful in certain cases. Well, this tutorial will introduce you to something far more powerful and general. Even better, it is the bridge to understanding and proving the famous quadratic formula.
Welcome to the world of completing the square!
Solving Quadratic Equations by Square Roots
Solve quadratics by taking the square root.
Solving Quadratic Equations by Completing the Square
Find the roots of a quadratic equation by completing the square.
Find the roots of a quadratic by completing the square. The numbers are a bit less convenient than they are in level 1.
Introduction to using the quadratic formula.
Proof of Quadratic Formula
Use the quadratic formula to find the roots of a quadratic function.
Complex Roots from the Quadratic Formula
Discriminant of Quadratic Equations
Discriminant for Types of Solutions for a Quadratic
Determine how many solutions a quadratic equation has and whether they are rational, irrational, or complex