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数学
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计算: -3x[-x(4x^2+x)-3(x+1)]
人气:138 ℃ 时间:2020-05-18 19:39:08
解答
-3x [-x(4x^2+x)-3(x+1)]
=-3x[-4x^3-x^2-3x-3]
=12x^4+3x^3+9x^2+9x
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