问题 解答题
(1)计算:|-3|-
16
+(π-3.14)0

(2)
6
x2-9
+
1
x+3
答案

(1)原式=3-4+1

=0;

(2)原式=

6
(x+3)(x-3)
+
1
x-3

=

6+x-3
(x+3)(x-3)

=

x+3
(x+3)(x-3)

=

1
x-3

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