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分解因式:(1-XY)^2+(X+Y-2)(X+Y-2XY)
人气:221 ℃ 时间:2020-02-05 04:56:24
解答
(x+y-2xy)(x+y-2)+(xy-1)^2
=(x+y)^2--2(xy+1)(x+y)+(xy+1)^2
=(x+y-xy-1)^2=(x-1)^2(y-1)^2
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