问题
解答题
化简: (1)
(2)
|
答案
(1)原式=
-2a (a+2)(a-2) 1•(a+2) (a+2)(a-2)
=2a-a-2 (a+2)(a-2)
=a-2 (a+2)(a-2)
=
;1 a+2
(2)原式=
•(a+2b)(a-2b) 4ab2 ab a+2b
=
.a-2b 4b
化简: (1)
(2)
|
(1)原式=
-2a (a+2)(a-2) 1•(a+2) (a+2)(a-2)
=2a-a-2 (a+2)(a-2)
=a-2 (a+2)(a-2)
=
;1 a+2
(2)原式=
•(a+2b)(a-2b) 4ab2 ab a+2b
=
.a-2b 4b