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因式分解:X^3-4XY^2-2XY+8Y^3
人气:336 ℃ 时间:2020-06-26 06:13:36
解答
=(x^3+8y^3)-2xy(x+2y)
=(x+2y)(x^2-2xy+4y^2)-2xy(x+2y)
=(x+2y)(x^2-4xy+4y^2)
=(x+2y)(x-2y)^2
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