CK-12 Foundation
Ck 12: Algebra: Factorization Using Perfect Square Trinomials
[Free Registration/Login may be required to access all resource tools.] Factor perfect square trinomials and the difference of two squares and solve quadratic equations by factoring.
CK-12 Foundation
Ck 12: Algebra: Comparing Methods for Solving Quadratics
[Free Registration/Login may be required to access all resource tools.] Select the best method to solve-real world quadratic equation problems.
CK-12 Foundation
Ck 12: Algebra: Solutions Using the Discriminant
[Free Registration/Login may be required to access all resource tools.] Learn how to use the discriminant to solve problems and determine the number of solutions to quadratic equations.
CK-12 Foundation
Ck 12: Algebra: Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] Learn how to use the quadratic formula.
CK-12 Foundation
Ck 12: Algebra: Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] Use the quadratic formula to solve equations and find the vertex of parabolas.
CK-12 Foundation
Ck 12: Algebra: The Quadratic Formula: Deriving and Using the Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] This lesson covers deriving the quadratic formula and using it to solve any quadratic equation.
CK-12 Foundation
Ck 12: Algebra: Factorization of Quadratic Expressions
[Free Registration/Login may be required to access all resource tools.] Factor quadratic polynomial expressions of the form ax^2 + bx + c.
CK-12 Foundation
Ck 12: Algebra: The Discriminant
[Free Registration/Login may be required to access all resource tools.] This lesson uses the discriminant to determine how many real solutions a quadratic equation has.
CK-12 Foundation
Ck 12: Algebra: Use Square Roots to Solve Quadratic Equations
[Free Registration/Login may be required to access all resource tools.] Use square roots to solve quadratic equations.
CK-12 Foundation
Ck 12: Algebra: Completing the Square
[Free Registration/Login may be required to access all resource tools.] Learn how to complete the square in order to solve quadratic equations.
Math Is Fun
Math Is Fun: Real World Examples of Quadratic Equations
Provides examples of how quadratic equations can be used in real-world scenarios, and the different methods used to solve them.
CK-12 Foundation
Ck 12: Algebra: Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] This lesson covers deriving the quadratic formula and using it to solve any quadratic equation.
CK-12 Foundation
Ck 12: Algebra: Use Graphs to Solve Quadratic Equations
[Free Registration/Login may be required to access all resource tools.] Learn how to use graphs to solve quadratic equations.
CK-12 Foundation
Ck 12: Trigonometric Equations Using the Quadratic Formula
[Free Registration/Login may be required to access all resource tools.] Examples of solving trigonometric equations using the quadratic formula.
CK-12 Foundation
Ck 12: Algebra: Solving Quadratic Equations Study Guide
This comprehensive study guide highlights the main terms and formulas needed to review solving quadratic equations. Examples are included.
Cool Math
Coolmath: Solving Quadratics Recap
This CoolMath resource reviews the ways to solve quadratic equations: factoring, finding square roots, and using the quadratic formula.
Cool Math
Coolmath: The Quadratic Formula
Reference material and practice problems using the quadratic formula.
Khan Academy
Khan Academy: Number of Solutions of Quadratic Equations
Analyze quadratic equations in order to determine how many different real number solutions they have.
Cuemath
Cuemath: Quadratic Equations
A comprehensive guide for learning all about quadratic equations with definitions, quadratic formulas, how to solve them, solved examples, and practice questions.
Other
Nearpod: Quadratic Equations: The Quadratic Formula
In this instructional activity, students will solve quadratic equations using the quadratic formula.
Help Algebra
Help algebra.com: Quadratic Equations
This article gives a definition of quadratic equations, then demonstrates how to solve them. Factoring, completing the square and the quadratic formula are the methods described. The examples are accompanied by lists of steps for solving...
Help Algebra
Help algebra.com: Quadratic Formula
This presentation of the quadratic equation includes a discussion on the discriminant and a derivation of the quadratic formula.
Math Notes and Math Tests
Pre Calculus Notes: The "Qf" Method for Factoring Quadratics [Pdf]
Learners examine the quadratic formula method for factoring quadratics. Examples with detailed solutions are included.