In this lesson on multiplying polynomials, the focus is on squaring a binomial. The instructor uses the order of operations to simplify each expression, emphasizing that 3 + 4 squared is not the same as 3 squared + 4 squared. Using the formula for squaring a binomial, a + b squared = a squared + 2ab + b squared, and a - b squared = a squared - 2ab + b squared, students learn how to multiply out expressions and the difference between a plus or minus in the middle of the binomial. The lesson ends with a cheer to help students remember these formulas.
Part 6 of Multiplying Polynomials covers the special product of squaring a binomial.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com