(x-y)^3+4x^2y-4xy^2 分解因式
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(x-y)^3+4x^2y-4xy^2分解因式(x-y)^3+4x^2y-4xy^2分解因式(x-y)^3+4x^2y-4xy^2分解因式x^3-y^3+3xy^2-3x^2y+4x^2y-4xy^2
(x-y)^3+4x^2y-4xy^2 分解因式
(x-y)^3+4x^2y-4xy^2 分解因式
(x-y)^3+4x^2y-4xy^2 分解因式
x^3-y^3+3xy^2-3x^2y+4x^2y-4xy^2
=x^3-y^3-xy^2+x^2y
=x(x^2-y^2)+y(X^2-y^2)
=(x+y)^2(x-y)
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