
因式分解,求详细步骤
2个回答
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原题分解不了,最后一项应是(xy-1)^2
(x+y-2xy)(x+y-2)+(xy-1)^2
=(x+y)^2-2(xy+1)(x+y)+4xy+(xy-1)^2
=(x+y)^2-2(xy+1)(x+y)+(xy+1)^2
=[(x+y)-(xy+1)]^2
=[(x-1)(y-1)]^2
(x+y-2xy)(x+y-2)+(xy-1)^2
=(x+y)^2-2(xy+1)(x+y)+4xy+(xy-1)^2
=(x+y)^2-2(xy+1)(x+y)+(xy+1)^2
=[(x+y)-(xy+1)]^2
=[(x-1)(y-1)]^2
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