计算 [2x²-(x-y)(x+y)][(2-x)(2+x)+(y-2)(y+2)]
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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)+【-
计算:(-x-2y) * (3x-y)
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1、x(x-y)(x+y)-x(x+y)^2
(1)(x^2/x)-y-x-y
计算2x/x^2-y^2 3x/y^2-x^2 y/(x y)(y-x)快!
【(x-y)^2+(x+y)(x-y)】除以 2x
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2