1/2x﹙﹣3x²+2x-1﹚-1/3x²﹙2x-6x²﹚ 化简 注:x为未知数,不是乘号
2个回答
原式=-3/2x³+x²-1/2x-2/3x³+2x^4
=2x^4-13/6x³+x²-1/2x
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