问题
解答题
先化简:(
|
答案
(
-a+1)÷3 a+1 a2-4a+4 a+1
=
×3-a2-2a-1 a+1
,a+1 (a-2)2
=
×2-a2-2a a+1 a+1 (a-2)2
=
,2-a2-2a (a-2)2
当a=0时,原式=
.1 2
先化简:(
|
(
-a+1)÷3 a+1 a2-4a+4 a+1
=
×3-a2-2a-1 a+1
,a+1 (a-2)2
=
×2-a2-2a a+1 a+1 (a-2)2
=
,2-a2-2a (a-2)2
当a=0时,原式=
.1 2