问题 解答题
计算或化简
(1)(
x+2
x-2
+
4
x2-4x+4
)
÷
x
x-2
;       
(2)
x2
2-x
+
4
x-2
,其中x=
3
-2
答案

(1)原式=

x2
(x-2)2
÷
x
x-2

=

x
x-2

(2)原式=

x2
2-x
-
4
2-x

=

x2-4
2-x

=

(x+2)(x-2)
2-x

=-x-2                  

当x=

3
-2时,原式=-
3

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