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4x²y²-(x²+y²)²因式分解
人气:262 ℃ 时间:2019-09-17 09:55:51
解答
4x²y²-(x²+y²)²=(2xy)²-(x²+y²)²=(2xy+x²+y²)(2xy-x²-y²)=-(x+y)²(x-y)².
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