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The Difference of Squares

Author: Elizabeth Dollhopf

Difference of Squares

Remember that in class we learned that if two binomials looked exactly alike except for the operation and one binomial was subtraction while the other was addition, then

$open parentheses a plus b close parentheses open parentheses a minus b close parentheses equals a squared minus b squared$

Thus if we are trying to find the factors of something that looks like $a squared minus b squared$

then they should look like $open parentheses a minus b close parentheses$ and $open parentheses a plus b close parentheses$

Use this information to take the multiple choice quiz to the right.