题目内容
若
=-
,求
的值.
| a |
| b |
| 8 |
| 9 |
| 3a+2b |
| b |
∵
=-
,
∴a=-
b,
∴
=
=-
+2=-
.
| a |
| b |
| 8 |
| 9 |
∴a=-
| 8 |
| 9 |
∴
| 3a+2b |
| b |
3×(-
| ||
| b |
| 8 |
| 3 |
| 2 |
| 3 |
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题目内容
| a |
| b |
| 8 |
| 9 |
| 3a+2b |
| b |
| a |
| b |
| 8 |
| 9 |
| 8 |
| 9 |
| 3a+2b |
| b |
3×(-
| ||
| b |
| 8 |
| 3 |
| 2 |
| 3 |