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(2x+3y)(3x^2-2xy+y^2)
人气:241 ℃ 时间:2020-06-22 17:04:42
解答
(2x+3y)(3x²-2xy+y²)=2x(3x²-2xy+y²)+3y(3x²-2xy+y²)=6x³-4x²y+2xy²+9x²y-6xy²+3y³=6x³+5x²y-4xy²+3y³
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