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数学
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(a+b)²(a-b)²用公式法的答案做?
人气:251 ℃ 时间:2020-05-10 12:17:14
解答
(a+b)²(a-b)²=[(a+b)(a-b)]²=(a²-b²)²=a^4-2a^2b^2+b^4
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