题目内容
(1)(3+
)(3-
)-(
-1)2;
(2)
•(-
)÷3
.(a>0,b>0)
| 5 |
| 5 |
| 3 |
(2)
| 2 |
| b |
| ab5 |
| 3 |
| 2 |
| a3b |
|
(1)原式=9-5-(3+1-2
)=4-4+2
=2
;
(2)原式=-(
•
•
)
=-
=-a2b
.
| 3 |
| 3 |
| 3 |
(2)原式=-(
| 2 |
| b |
| 3 |
| 2 |
| 1 |
| 3 |
ab5•a3b•
|
=-
| 1 |
| b |
| a5b5 |
| ab |
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