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*This question is included in Nova Math - Problem Set U: Algebraic Expressions, question #6

The solution is

Posted: 11/02/2012 11:49

I can't follow the logic.

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Contributor

Posted: 11/02/2012 12:24

Hello T, the explanation simply expands the terms inside the parentheses that are raised to the power of 2, in other words: foiling.

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