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(2x^2y-4xy^2+6y^3)\(-1\2y)(4)[(x+1)(x+2)-2]\x
人气:180 ℃ 时间:2020-05-29 07:03:31
解答
(2x^2y-4xy^2+6y^3)\(-1\2y)
=-4x²+8xy-12y²
(4)[(x+1)(x+2)-2]\x
=(x²+3x+2-2)/x
=x+3
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