计算:(-x+2y)*(x-2y) (-2y+x)*(x-2y)
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计算:(-x+2y)*(x-2y) (-2y+x)*(x-2y)
计算:(-x+2y)*(x-2y) (-2y+x)*(x-2y)
计算:(-x+2y)*(x-2y) (-2y+x)*(x-2y)
(-x+2y)*(x-2y) (-2y+x)*(x-2y)
=-(x-2y)*(x-2y)*(x-2y)*(x-2y)
=-(x-2y)的4次方
在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.
原式=[-(x-2y)]*(x-2y)*(x-2y)*(x-2y)
=-(x-2y)⁴
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