问题
解答题
化简: (1)(xy-y2)÷
(2)
|
答案
(1)原式=y(x-y)•
•xy (x-y)2
=x-y x2
;y2 x
(2)原式=
•a-1 a-2
=2(a-2) (a-1)2
.2 a-1
化简: (1)(xy-y2)÷
(2)
|
(1)原式=y(x-y)•
•xy (x-y)2
=x-y x2
;y2 x
(2)原式=
•a-1 a-2
=2(a-2) (a-1)2
.2 a-1