问题
解答题
化简: (1)
(2)
(3)(-
|
答案
(1)原式=
;bc-a2 ac
(2)原式=
-(x+1)=x (x+1)(x-1)
;x-(x+1)2(x-1) (x+1)(x-1)
(3)原式=
-9a2 b2
=b2 3a2
.27a4-b4 3a2b2
化简: (1)
(2)
(3)(-
|
(1)原式=
;bc-a2 ac
(2)原式=
-(x+1)=x (x+1)(x-1)
;x-(x+1)2(x-1) (x+1)(x-1)
(3)原式=
-9a2 b2
=b2 3a2
.27a4-b4 3a2b2