(x-y)(x-y)2(y-x)
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/04 01:28:08
(x-y)(x-y)2(y-x)
(x+2y-?)(x-2y+?)
(x+2y-?)(x-2y+?)
![(x-y)(x-y)2(y-x)](/uploads/image/z/19461484-28-4.jpg?t=%EF%BC%88x-y%29%28x-y%292%28y-x%29)
x^2(x-y)+y^2(y-x)
=x^2(x-y)-y^2(x-y)
=(x-y)(x^2-y^2)
=(x-y)(x-y)(x+y)
=(x-y)^2(x+y)
再问: (x-y)(x-y)2(y-x)中的2平方,?是二分之一 急用!谢谢
=x^2(x-y)-y^2(x-y)
=(x-y)(x^2-y^2)
=(x-y)(x-y)(x+y)
=(x-y)^2(x+y)
再问: (x-y)(x-y)2(y-x)中的2平方,?是二分之一 急用!谢谢
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有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-