题目内容
当a分别取下列值时,求代数式
的值.
1.a=-3
2.a=
.
| 4a2+2a-1 |
| 3a |
1.a=-3
2.a=
| 2 |
| 3 |
(1)当a=-3时,原式=
=-
;
(2)当a=
时,原式=
=
.
| 4×9-6-1 |
| -9 |
| 29 |
| 9 |
(2)当a=
| 2 |
| 3 |
4×
| ||||
3×
|
| 19 |
| 18 |
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题目内容
| 4a2+2a-1 |
| 3a |
| 2 |
| 3 |
| 4×9-6-1 |
| -9 |
| 29 |
| 9 |
| 2 |
| 3 |
4×
| ||||
3×
|
| 19 |
| 18 |