Curated OER
Lists, Lists, Lists
Students identify HTML codes for creating unordered, ordered, and nested lists for a web page, place different list types within HTML documents, and view the changes within web pages.
Lawrence Hall of Science
The Math Page: Skill in Algebra: The Difference of Two Squares
Here is a site that clearly and thoroughly explains factoring and multiplying a difference of two squares. There are example problems solved, problems for the student to attempt, and answers to the student problems. A set of cumulative...
Cool Math
Coolmath: Difference of Two Squares, Sum and Difference of Two Cubes
This algebra lesson explains how to factor the difference of two squares and the sum and difference of two cubes.
Mangahigh
Mangahigh: Algebra: Factor Using the Difference of Two Squares
Students watch an online tutorial on the concept of factoring using the difference of two squares . After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based on their...
Mangahigh
Mangahigh: Algebra: Factor Using the Difference of Two Squares
Students watch an online tutorial on the concept of factoring trinomials using the difference of two squares. After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based...
Wyzant
Wyzant: Factoring a Difference Between Two Squares Lessons
Several examples are presented to demonstrate how to factor a polynomial that is a difference of two squares. The online worksheet helps for extra practice.
Sophia Learning
Sophia: Using the Difference of Two Squares to Solve Equations: Lesson 2
This lesson demonstrates how to use the difference of two squares and the zero product property to solve for binomial equations. It is 2 of 4 in the series titled "Using the Difference of Two Squares to Solve Equations."
Sophia Learning
Sophia: Using the Difference of Two Squares to Solve Equations: Lesson 4
This lesson demonstrates how to use the difference of two squares and the zero product property to solve for binomial equations. It is 4 of 4 in the series titled "Using the Difference of Two Squares to Solve Equations."
Oswego City School District
Regents Exam Prep Center: Factoring the Difference of Two Perfect Squares
Use this site to learn the trick to factoring when the polynomial is a difference of two perfect squares. The site contains examples that are easy to follow.
Discovery Education
Discovery Education: Web Math: Factor Polynomial by Rewriting It as the Difference Between Two Squares
This WebMath site includes an interactive problem solver. Use it to factor a polynomial that is the difference between two perfect squares. The website will bring back a full explanation behind the answer.
CK-12 Foundation
Ck 12: Algebra: Factorization Using Difference of Squares
[Free Registration/Login may be required to access all resource tools.] Factor the difference of two squares and perfect square trinomials and solve quadratic polynomial equations by factoring.
CK-12 Foundation
Ck 12: Algebra: Factorization Using Difference of Squares
[Free Registration/Login may be required to access all resource tools.] Factor the difference of two squares and perfect square trinomials and solve quadratic polynomial equations by factoring.
Wyzant
Wyzant: Factoring a Difference Between Two Squares Worksheet
The resource consists of a worksheet, answer sheet, and example problem on factoring expressions as a difference between two squares.
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Factoring Polynomials
This page includes a tutorial which teaches you how to find the Greatest Common Factor (GCF) of a polynomial, factor out the GCF of a polynomial, factor a polynomial with four terms by grouping, factor trinomials, and factor a difference...
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.
Khan Academy
Khan Academy: Difference of Squares
Factor quadratic expressions of the general difference of squares form. The factored expressions have the general form (ax+b)(ax-b). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
Khan Academy
Khan Academy: Difference of Squares Intro
Factor quadratic expressions into the special products of the general form (x+a)(x-a). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
University of Saskatchewan (Canada)
University of Saskatchewan: Factoring Polynomials
This site from the University of Saskatchewan provides an explanation of factoring by grouping, greatest common factor, perfect squares, and difference of squares. Higher degree polynomials factored as well. Some examples provided along...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Difference of Squares
Find a quick, concise explanation of how to find the difference of squares. An example is given and clearly explained.
Interactive Mathematics
Interactive Mathematics: Common Factor & Difference of Squares
These easy to follow examples demonstrate how to factor algebraic expression using GCF and difference of squares.
Math2
Math2.org: Polynomial Identities
This resource provides a list of polynomial identities, including formulas for squaring a binomial, FOILing a trinomial, factoring a difference of two squares, factoring a sum or difference of two cubes, and the Quadratic Formula.
Other
Dans Math: Lessons: Beginning Algebra
College professor Dan Bach offers a review of basic algebra concepts complete with definitions, explanations, and examples. Topics include simplifying expressions, solving linear equations, and graphing.
Purple Math
Purplemath: Special Factoring: Differences of Squares
Demonstrates how to use the formula for finding the differences of squares, and warns against trying to factor a sum of squares.
Harvey Mudd College
Mudd Math Fun Facts: Difference of Squares
Using algebra, learn how to do fast math in your head!