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x^3-4y^3+x^2y-4xy^2
人气:237 ℃ 时间:2020-06-02 11:48:56
解答
x^3-4y^3+x^2y-4xy^2
=x^3+x^2y-4y^3-4xy^2
=x²(x+y)-4y²(x+y)
=(x+y)(x²-4y²)
=(x+y)(x+2y)(x-2y)
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