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(A) x3-y3
(B) ...
(C) ...
(D) ...
(E) ...

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

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Posted: 11/02/2012 11:49
I can't follow the logic.
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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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