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.
Sophia Learning
Sophia: Figuring Out the Discriminant
Students learn how to determine the discriminant and use it to find the real solutions to a quadratic equation. Videos and graphs are included in the resource.
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....
Imagine Learning Classroom
Learn Zillion: Derive the Quadratic Formula: Completing the Square
In this lesson, you will learn how to derive the quadratic formula by completing the square. [6:01]
PatrickJMT
Patrick Jmt: Quadratic Formula
Easy to understand video tutorial shows how to use the quadratic formula to find solutions to quadratic equations. [6:21]
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.
Khan Academy
Khan Academy: The Quadratic Formula: Example: Quadratics in Standard Form
Identifies the standard form of a quadratic equation and models how to put a given quadratic equation into standard form
Khan Academy
Khan Academy: The Quadratic Formula: How to Use the Quadratic Formula
Introduction to using the quadratic formula.
Sophia Learning
Sophia: Projectile Motion Part 1: Example 5
Through a combination of a slide presentation and a video lecture, learn how to solve a projectile motion problem involving a baseball. [14:29]
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.
Sophia Learning
Sophia: Quadratic Formula and Complex Numbers
Explains how complex numbers are related to the quadratic formula, in particular talks about the determinant of the quadratic formula being a negative.
Sophia Learning
Sophia: Quadratic Formula and Complex Numbers
Explains how complex numbers are related to the quadratic formula, in particular talks about the determinant of the quadratic formula being a negative.
Sophia Learning
Sophia: Using the Discriminant: Lesson 2
This lesson walks you through the steps to use the discriminant to determine the nature of the roots of the equation. It is 2 of 10 in the series titled "Using the Discriminant." Includes short quiz. [3:16]
Sophia Learning
Sophia: Using the Discriminant: Lesson 3
This lesson walks you through the steps to use the discriminant to determine the nature of the roots of the equation. It is 3 of 10 in the series titled "Using the Discriminant." Includes short quiz. [4:12]
Sophia Learning
Sophia: Using the Discriminant: Lesson 4
This lesson walks you through the steps to use the discriminant to determine the nature of the roots of the equation. It is 4 of 10 in the series titled "Using the Discriminant." Includes short quiz. [3:27]