Khan Academy
Khan Academy: Algebra: Solving a Quadratic by Factoring
Video demonstrates how to solve quadratic equations by factoring. Three example problems are solved and the connection is shown between the solution and graph of an equation. [9:12]
Khan Academy
Khan Academy: Algebra: Applying the Quadratic Formula
Demonstrates how to find the solutions of a given quadratic equation with a negative leading coefficient using the quadratic formula. [4:51]
Virtual Nerd
Virtual Nerd: Solving Quadratic Equations by Inspection, Taking Square Roots
Pick from a variety of tutorials to teach how to solve quadratic equations using various methods.
Khan Academy
Khan Academy: The Quadratic Formula: Using the Quadratic Formula
Demonstrates how to solve a quadratic equation using the quadratic formula.
Khan Academy
Khan Academy: The Quadratic Formula: Example 1: Using the Quadratic Formula
Demonstrates how to use the quadratic formula to solve a quadratic equation with a negative leading coefficient.
Khan Academy
Khan Academy: The Quadratic Formula: Example 3: Using the Quadratic Formula
Explains how to determine the number of solutions a quadratic equation has based on the value of the discriminant.
Randy Thomas
Solving Quadratic Equations With Complex Solutions
This tutorial discusses solving quadratic equations using square roots, completing the square, and the quadratic formula. Problems which previously had no solution can now be solved with the inclusion of the complex number system....
Khan Academy
Khan Academy: Factoring Quadratics: Factoring Special Products
Explore Factoring Special Products through this video.
Khan Academy
Khan Academy: Algebra: Using the Quadratic Formula
Video shows how to use the quadratic formula to solve quadratic equations. The solutions to one example are verified by graphing the associated quadratic function. Includes link to additional practice problems. [16:32]
Khan Academy
Khan Academy: The Quadratic Formula: Applying the Quadratic Formula
This video shows an application problem with Quadratic Formula.
Sophia Learning
Sophia: Solving an Equation Using the Quadratic Formula #4
Using the quadratic formula with terms that include trigonometric expressions is shown here.
Sophia Learning
Sophia: Solving an Equation Using the Quadratic Formula #6
Using the quadratic formula with terms that include trigonometric expressions is shown here.
Sophia Learning
Sophia: Solving an Equation Using the Quadratic Formula #7
Using the quadratic formula with terms that include trigonometric expressions is shown here.
Sophia Learning
Sophia: Using the Quadratic Formula: Lesson 10
This lesson describes how to use the quadratic formula to determine the solution of a quadratic equation in a specific format. It is 10 of 16 in the series titled "Using the Quadratic Formula."
Sophia Learning
Sophia: Using the Quadratic Formula: Lesson 13
This lesson describes how to use the quadratic formula to determine the solution of a quadratic equation in a specific format. It is 13 of 16 in the series titled "Using the Quadratic Formula."
Sophia Learning
Sophia: Using the Quadratic Formula: Lesson 4
This lesson describes how to use the quadratic formula to determine the solution of a quadratic equation in a specific format. It is 4 of 16 in the series titled "Using the Quadratic Formula." Includes a short multiple-choice quiz. [2:30]
Sophia Learning
Sophia: Using the Quadratic Formula: Lesson 9
This lesson describes how to use the quadratic formula to determine the solution of a quadratic equation in a specific format. It is 9 of 16 in the series titled "Using the Quadratic Formula." Includes a short multiple-choice quiz. [2:56]
Sophia Learning
Sophia: Solving an Equation Using the Quadratic Formula
Using the quadratic formula with terms that include trigonometric expressions is shown here. [3:03]
Sophia Learning
Sophia: Solving an Equation Using the Quadratic Formula #5
Using the quadratic formula with terms that include trigonometric expressions is shown here.