问题
解答题
计算
(1)x3÷x2
(2)[(x+y)2-y(2x+y)-8x]÷2x.
答案
(1)原式=x 3-2=x;
(2)原式=(x2+2xy+y2-2xy-y2-8x)÷2x
=(x2-8x)÷2x
=
-4.x 2
计算
(1)x3÷x2
(2)[(x+y)2-y(2x+y)-8x]÷2x.
(1)原式=x 3-2=x;
(2)原式=(x2+2xy+y2-2xy-y2-8x)÷2x
=(x2-8x)÷2x
=
-4.x 2