问题
解答题
计算:[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
答案
[x(x2y2-xy)-y(x2+x3y)]÷3x2y,
=(x3y2-x2y-x2y-x3y2)÷3x2y,
=-2x2y÷3x2y,
=-
.2 3
计算:[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
[x(x2y2-xy)-y(x2+x3y)]÷3x2y,
=(x3y2-x2y-x2y-x3y2)÷3x2y,
=-2x2y÷3x2y,
=-
.2 3