(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
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(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
![(x-y)的2次方-2(x-y)+(x-y)-5(x-y)](/uploads/image/z/1506684-12-4.jpg?t=%28x-y%29%E7%9A%842%E6%AC%A1%E6%96%B9-2%28x-y%29%2B%28x-y%29-5%28x-y%29)
(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
=(x-y)²-2(x-y)+(x-y)-5(x-y)
=(x-y)²-(x-y)-5(x-y)
=(x-y)²-6(x-y)
=(x-y)(x-y-6)
再问: -(x的2次方y+3xy-4)+3(x的2次方y-xy+2)
=(x-y)²-2(x-y)+(x-y)-5(x-y)
=(x-y)²-(x-y)-5(x-y)
=(x-y)²-6(x-y)
=(x-y)(x-y-6)
再问: -(x的2次方y+3xy-4)+3(x的2次方y-xy+2)
(x-y)的2次方-2(x-y)+(x-y)-5(x-y)
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