4x²y³﹙2x²－3xy＋5y²﹚÷﹙﹣4x²y²﹚
人气：223 ℃ 时间：2019-12-06 01:40:23
解答
4x²y³﹙2x²－3xy＋5y²﹚÷﹙﹣4x²y²﹚
=-xy(2x²－3xy＋5y²)
=-2x³y+3x²y²-5xy³
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