帮忙做2个题 (x+y+1)(x+y-1) (2x-y-3)²
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帮忙做2个题(x+y+1)(x+y-1)(2x-y-3)²帮忙做2个题(x+y+1)(x+y-1)(2x-y-3)²帮忙做2个题(x+y+1)(x+y-1)(2x-y-3)&sup
帮忙做2个题 (x+y+1)(x+y-1) (2x-y-3)²
帮忙做2个题 (x+y+1)(x+y-1) (2x-y-3)²
帮忙做2个题 (x+y+1)(x+y-1) (2x-y-3)²
2题?分开的么
如果不对.你可以联系叫我修改
(x+y+1)(x+y-1)=(x+y)2 -1
(2x-y-3)² =(2(x-1) +(y-1))2
帮忙做2个题 (x+y+1)(x+y-1) (2x-y-3)²
因式分解 4(x-y+1)+y(y-2x)帮忙做下………………谢了
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