问题
解答题
(1)计算:(
(2)计算:
|
答案
(1)原式=1+
-13
=
;3
(2)原式=
-a(a+1) (a+1)(a-1) a+1 (a+1)(a-1)
=(a+1)(a-1) (a+1)(a-1)
=1.
(1)计算:(
(2)计算:
|
(1)原式=1+
-13
=
;3
(2)原式=
-a(a+1) (a+1)(a-1) a+1 (a+1)(a-1)
=(a+1)(a-1) (a+1)(a-1)
=1.