题干
若实数a满足a3+a2﹣3a+2=
﹣
﹣
，则a+
=____
| 3 |
| a |
| 1 |
| a |
| 2 |
| 1 |
| a |
| 3 |
| 1 |
| a |
答案(点此获取答案解析）
﹣3或2
