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