(x^3+y^3)(x+y)变成(x+y)^2 *(x^2-xy+y^2)急求(x+y)(x^3+y^3)=(x+y)^2(x^2-xy+y^2)

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(x^3+y^3)(x+y)变成(x+y)^2*(x^2-xy+y^2)急求(x+y)(x^3+y^3)=(x+y)^2(x^2-xy+y^2)(x^3+y^3)(x+y)变成(x+y)^2*(x^2

(x^3+y^3)(x+y)变成(x+y)^2 *(x^2-xy+y^2)急求(x+y)(x^3+y^3)=(x+y)^2(x^2-xy+y^2)
(x^3+y^3)(x+y)变成(x+y)^2 *(x^2-xy+y^2)急求
(x+y)(x^3+y^3)
=(x+y)^2(x^2-xy+y^2)

(x^3+y^3)(x+y)变成(x+y)^2 *(x^2-xy+y^2)急求(x+y)(x^3+y^3)=(x+y)^2(x^2-xy+y^2)
(x+y)(x^3+y^3)
=(x+y)(x+y)(x^2-xy+y^2)
=(x+y)^2(x^2-xy+y^2)