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