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