3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x)
问题描述:
3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x)
答
3xy(x²-xy²+xy)-xy²(2x²-xy+2x)=3x³y-3x²y³+3x²y²-2x³y²+x²y²-2x²y²=3x³y-2x³y²-3x²y³+2x²y² (求...
3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x)
3xy(x²-xy²+xy)-xy²(2x²-xy+2x)=3x³y-3x²y³+3x²y²-2x³y²+x²y²-2x²y²=3x³y-2x³y²-3x²y³+2x²y² (求...