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11. a) By how much is a^2-2ab-b^2 more than 2a^2 +2ab - 2b^2?b) By how much is 2(a^2+ b^2') less than a^2 +2ab +b^2?2 |
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Answer» 2a^2+2ab+b^2-a^2+2ab+b^2=4ab+2b^2a^2+2ab+b^2-2a^2-2b^2=2ab-a^2-b^2 |
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