问题
解答题
(1)计算:|-
(2)化简:(
|
答案
(1)原式=
-3+1-1 2
=-2;1 2
(2)原式=
•a2-4 a-2 1 a2+2a
=
•(a+2)(a-2) a-2 1 a(a+2)
=
.1 a
(1)计算:|-
(2)化简:(
|
(1)原式=
-3+1-1 2
=-2;1 2
(2)原式=
•a2-4 a-2 1 a2+2a
=
•(a+2)(a-2) a-2 1 a(a+2)
=
.1 a