问题
解答题
(1)计算:(-
(2)
|
答案
(1)原式=-
•a6b3 c3d9
•d3 2a
=-c2 4a2
;a3b3 cd3
(2)原式=
•a a-1
-(a+1)(a-1) a(a-1) 1 a-1
=
-a+1 a-1 1 a-1
=a a-1
(1)计算:(-
(2)
|
(1)原式=-
•a6b3 c3d9
•d3 2a
=-c2 4a2
;a3b3 cd3
(2)原式=
•a a-1
-(a+1)(a-1) a(a-1) 1 a-1
=
-a+1 a-1 1 a-1
=a a-1