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.
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.
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.
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.
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.