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数学
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化简 a²-(2ab-b²)-b²
人气:376 ℃ 时间:2019-12-19 01:31:57
解答
a²-(2ab-b²)-b²
=a²-2ab+b²-b²
=(a-b)^2-b^2
=(a-b+b)(a-b-b)
=a(a-2b)
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