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(3x^2+1/2y-2/3y^2)*(-1/2xy)^2
人气:215 ℃ 时间:2020-02-28 19:03:22
解答
(3x^2+1/2y-2/3y^2)*(-1/2xy)^2
=(3x²+1/2y-2/3y²)(1/4x²y²)
=3/4x^4y²+1/8x²y³-1/6x²y^4
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