内江职业技术学院贴吧:.x? + y?
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编程 x! +(x+y)! +y!
(x-y)^3*(x-y)^2*(y-x)
3X(X-Y)+2Y(X-Y)
(x-y)4*(y-x)3=(y-x)7 ()
因式分解(x-y)(x-y)-4(x-y-1)
因式分解:(x+y)(x+y)+4(x-y)(x-y)-4(x·x-y·y)
(x+y)^2+x+y 怎么因式分解
(x+y)^3÷(x+y)=?