先化简,再求值:(x-y)²(x²+xy+y²)-(x³+y³)(-x³+y³),其中X=1,Y=-1
先化简,再求值:(x-y)²(x²+xy+y²)-(x³+y³)(-x³+y³),其中X=1,Y=-1
数学人气:491 ℃时间:2020-05-01 14:46:50
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(x-y)²(x²+xy+y²)-(x³+y³)(-x³+y³),其中X=1,Y=-1=(x-y)²(x²+xy+y²)+(x³+y³)(x-y)(x²+y²+xy)=(x-y)(x²+xy+y²)(x-y+x³+y³...
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