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求化简并求值以下的因式(初三)
(x-y)²(x²+xy+y²)²-(x³+y³)(-x³+y³),其中x=1,y=-1
人气:235 ℃ 时间:2020-09-22 23:17:04
解答
(x-y)²(x²+xy+y²)²-(x³+y³)(-x³+y³)=[(x-y)(x²+xy+y²)]²-[(y³)²-(x³)²]=(x³-y³)²-y^6+x^6=x^6+y^6-2x&#...
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