2xy(½x2y-2y2x)(3x²y+4xy²-x³y³)×（-xy³）²
更新时间：2026-10-01 19:23:10
问题描述:
2xy(½x2y-2y2x)(3x²y+4xy²-x³y³)×（-xy³）²
范长伟回答:
2xy(½x²y-2y²x)=2xy×½x²y-2xy×2y²x=2×½×(x×x²)×(y×y)-2×2×(x×x)×(y×y²)=x³y²-4x²y³(3x²y+4xy²-x³y³)×(-xy...