mathematica 8因式分解含参多项式(1 + a) x^3 - (a - b) xy (x - y) + (1 + b) y^3

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mathematica 8因式分解含参多项式(1 + a) x^3 - (a - b) xy (x - y) + (1 + b) y^3
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mathematica 8因式分解含参多项式(1 + a) x^3 - (a - b) xy (x - y) + (1 + b) y^3
mathematica 8因式分解含参多项式(1 + a) x^3 - (a - b) xy (x - y) + (1 + b) y^3

mathematica 8因式分解含参多项式(1 + a) x^3 - (a - b) xy (x - y) + (1 + b) y^3
In[1]:= (1 + a) x^3 - (a - b) x y (x - y) + (1 + b) y^3 // Factor
Out[1]= (x + a x + y + b y) (x^2 - x y + y^2)

Factor[(1+a)x^3-(a-b)x*y(x-y)+(1+b)y^3]