In this lesson on factoring, we learn about the formula for factoring the difference of two squares, which is a subtraction sign between two perfect squares. By using the formula, a plus b times a minus b, we can easily factor expressions like 4x squared minus 9 or m squared minus 16y squared. We also learn that the sum of two squares cannot be factored, and that recognizing a difference of two squares is key to factoring efficiently.
Covers the formula for the factoring the difference of two squares, including examples.
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