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