题目内容
先化简,再求值:
-
,其中m=7.
| 4 |
| m-3 |
| 2m-6 |
| m2-6m+9 |
| 4 |
| m-3 |
| 2m-6 |
| m2-6m+9 |
| 4 |
| m-3 |
| 2(m-3) |
| (m-3)2 |
=
| 4 |
| m-3 |
| 2 |
| m-3 |
=
| 2 |
| m-3 |
当m=7时,原式=
| 2 |
| 7-3 |
| 1 |
| 2 |
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题目内容
| 4 |
| m-3 |
| 2m-6 |
| m2-6m+9 |
| 4 |
| m-3 |
| 2m-6 |
| m2-6m+9 |
| 4 |
| m-3 |
| 2(m-3) |
| (m-3)2 |
| 4 |
| m-3 |
| 2 |
| m-3 |
| 2 |
| m-3 |
| 2 |
| 7-3 |
| 1 |
| 2 |