问题
解答题
(1)计算:(
(2)化简
|
答案
(1)原式=2-2
×2×2
-1+3-2 2
=-3
;3
(2)原式=
÷(a+1)(a-1) a
=a2-2a+1 a
•(a+1)(a-1) a
=a (a-1)2
.a+1 a-1
(1)计算:(
(2)化简
|
(1)原式=2-2
×2×2
-1+3-2 2
=-3
;3
(2)原式=
÷(a+1)(a-1) a
=a2-2a+1 a
•(a+1)(a-1) a
=a (a-1)2
.a+1 a-1