题目内容
计算:
(1)(a2)3•(a2)4÷(a2)5;
(2)[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
(1)(a2)3•(a2)4÷(a2)5;
(2)[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
(1)原式=a6•a8÷a10=a14÷a10=a4;
(2)原式=(x3y2-x2y-x2y-x3y2)÷3x2y=-2x2y÷3x2y=-
.
(2)原式=(x3y2-x2y-x2y-x3y2)÷3x2y=-2x2y÷3x2y=-
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