问题 解答题
计算:
(1)(
1
3
-1-(
5
-2
0+
18
-(-2)2-
2

(2)化简:
x2
x-2
-
4x
x-2
+
4
x-2
答案

(1)原式=3-1+3

2
-4-
2

=-2+2

2

(2)

x2
x-2
-
4x
x-2
+
4
x-2

=

x2-4x+4
x-2

=

(x-2)2
x-2

=x-2.

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