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(-2X)平方+(6X立方-12X4次方)/(3X平方)
人气:363 ℃ 时间:2019-08-20 21:01:40
解答
4x^2+(6x^3-12x^4)/(3x^2)
=4x^2+3x^2(2x-4x^2)/(3x^2)
=4x^2+2x-4x^2
=2x
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