In this lesson, we learn about the special product of multiplying (a + b)(a - b) to get the difference of two squares. The instructor teaches various methods to multiply polynomials, including foil, smiley face and box method. By the end of the lesson, the students understand how to use the formula for the difference of two squares to simplify expressions and solve problems more efficiently.
Part 5 of Multiplying Polynomials covers the special product of multiplying (a + b)(a - b) to get the difference of two squares.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com