Khan Academy
Khan Academy: Algebra: Completing the Square 1
Demonstrates how to use the completing the square method to identify a constant value for a given trinomial to create a perfect square trinomial. Practice problems available. [3:22]
Khan Academy
Khan Academy: Algebra: Completing Perfect Square Trinomials
Explains how to use the completing the square method to determine what constant value can be added to a given polynomial to create a perfect square trinomial. [3:28]
Khan Academy
Khan Academy: Algebra: Ca Algebra I: Completing the Square
Demonstrates solutions to problems #48-52 of California Algebra I released state test questions. Problems address understanding of solving quadratic equations by factoring and completing the square. Practice problems available. [13:48]
Khan Academy
Khan Academy: Algebra: Quadratic Formula 2
Demonstrates how to solve a quadratic equation that begins in the form ax^2 + bx = c using the quadratic formula. [6:40]
Khan Academy
Khan Academy: Algebra: Quadratic Formula 1
Demonstrates how to use the quadratic formula to solve a quadratic equation with a negative leading coefficient. [5:34]
Khan Academy
Khan Academy: Algebra: Solving Quadratic Equations by Factoring 3
Explains how to solve a word problem that involves finding the dimensions of a box given the volume and the height of the box. The solution requires solving a quadratic equation (by factoring) to find the length and width of the box. [5:54]
Khan Academy
Khan Academy: Algebra: Quadratic Formula 3
Explains how to determine the number of solutions a quadratic equation has based on the value of the discriminant. [4:59]
Khan Academy
Khan Academy: Algebra: Factoring Special Products
Demonstrates how to solve quadratic equations by factoring. Four equations are solved some involving special products including perfect square trinomials and difference of squares. This video also appears in the Algebra: ck12.org strand....
Khan Academy
Khan Academy: Algebra: Complex Numbers: Complex Roots From the Quadratic Formula
Video shows how to use the quadratic formula to find roots of a quadratic equation in a situation where the roots are complex. Includes showing how to verify the answers are correct solutions of the quadratic. [10:15]
Khan Academy
Khan Academy: Algebra Ii: Quadratics and Shifts
Demonstrates solutions to four problems. Problems address understanding of quadratic equations, ways to solve quadratic equations, and translations of graphs of quadratic equations. Practice problems available. [11:53]
Khan Academy
Khan Academy: Algebra: Application Problem With Quadratic Formula
Explains how to solve a word problem regarding the amount of time it takes for a ball to hit the ground after being shot off a building by using the quadratic formula to find solutions to the given equation. [5:53]
Khan Academy
Khan Academy: Algebra: Quadratic Equation Part 2
Explains how to use the quadratic formula to find the solutions to a quadratic equation. Two different examples are solved. [9:14]
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]
Khan Academy
Khan Academy: Algebra: Introduction to the Quadratic Equation
Explains how to solve quadratic equations, or find the roots of the equation, by factoring and by using the quadratic formula. Three different equations are solved. [9:14]
Khan Academy
Khan Academy: Algebra I: Simple Quadratic Equation
Demonstrates how to solve a quadratic equation with no bx term by using the square root property. [2:18]
Khan Academy
Khan Academy: Graphing Quadratics: Applying Quadratic Functions 2
Video solving an application problem by finding a quadratic equation to represent the distance of a diver above the water based on his time in the air by determining his average velocity.
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: Completing the Square
Students learn how to complete the square to solve quadratic equations. Notes, examples, and a video lesson explore the math concept.
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.
Khan Academy
Khan Academy: Quadratic Odds and Ends: Quadratics and Shifts
Problems address understanding of quadratic equations, ways to solve quadratic equations, and translations of graphs of quadratic equations.
