[x(x²y²-xy)-y(x²-x³y)]÷3x²y

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 09:18:07
[x(x²y²-xy)-y(x²-x³y)]÷3x²y

[x(x²y²-xy)-y(x²-x³y)]÷3x²y
[x(x²y²-xy)-y(x²-x³y)]÷3x²y

[x(x²y²-xy)-y(x²-x³y)]÷3x²y
=[x²y(xy-1)-x²y(1-xy)]÷3x²y
=[x²y(xy-1)+x²y(1+xy)]÷3x²y
=[x²y(xy-1+1+xy)]÷3x²y
=2x³y²÷3x²y
=三分之二xy
(三分之二不会表示,抱歉……)