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数学
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化简求值:2x²(x²-x+1)-x(2x³-10x²+2x),其中x=-½
要过程.多谢高手相助.
人气:133 ℃ 时间:2020-03-23 05:45:20
解答
原式=2x⁴-2x³+2x²-2x⁴+10x³-2x²
=8x³
=8×(-½)³
=-1不客气,采纳吧
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