(1)(π−1)0+(−1/2)−1+|5−27|−23. (2)(2+3)2−(2−3)(2+3).

问题描述:

(1)(π−1)0+(−

1
2
)−1+|5−
27
|−2
3
.  
(2)(
2
+
3
)2−(
2
3
)(
2
+
3
)

(1)原式=1-2+3

3
-5-2
3
=
3
-6;
  (2)原式=2+3+2
6
-(2-3)=2
6
+6.