(a-b)(x-y)-(b-a)(x+y)怎么算
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(a-b)(x-y)-(b-a)(x+y)怎么算(a-b)(x-y)-(b-a)(x+y)怎么算(a-b)(x-y)-(b-a)(x+y)怎么算(a-b)(x-y)-(b-a)(x+y)=(a-b)(
(a-b)(x-y)-(b-a)(x+y)怎么算
(a-b)(x-y)-(b-a)(x+y)怎么算
(a-b)(x-y)-(b-a)(x+y)怎么算
(a-b)(x-y)-(b-a)(x+y)=(a-b)(x-y)+(a-b)(x+y)=(a-b)(x-y+x+y)=2x(a-b)
(a-b)(x-y)-(b-a)(x+y)=-(b-a)（x-y)-(b-a)(x+y)=-2x(b-a)
已知条件和求什么啊？
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通分x/a(x-y),y/b(y-x)
通分 a/(y-x)^2,b/(x-y)(x+y)
因式分解a(x-y)+b(y-x)+(2x-y)
(a-b)(x-y)-(b-a)(x+y)怎么算
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化简(x-y)(a+b)-(x-y)(a-b)
(a-b)(x-y)+(b-a)(y-x)
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(a-b)(x-y)-(b-a)(x y)如何解题
(a-b)(x-y)-(b-a)(x+y)
因式分解,（a-b)(x-y)-(b-a)(x-y)（a-b)(x-y)-(b-a)(x+y）