题目内容
计算:
+
+
.
| 12 |
| m2-9 |
| 2 |
| 3-m |
| 2 |
| m+3 |
| 12 |
| m2-9 |
| 2 |
| 3-m |
| 2 |
| m+3 |
=
| 12 |
| (m+3)(m-3) |
| -2(m+3) |
| (m+3)(m-3) |
| 2(m-3) |
| (m+3)(m-3) |
=
| 12-2(m+3)+2(m-3) |
| (m+3)(m-3) |
=
| 12-2m-6+2m-6 |
| (m+3)(m-3) |
=0
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题目内容
| 12 |
| m2-9 |
| 2 |
| 3-m |
| 2 |
| m+3 |
| 12 |
| m2-9 |
| 2 |
| 3-m |
| 2 |
| m+3 |
| 12 |
| (m+3)(m-3) |
| -2(m+3) |
| (m+3)(m-3) |
| 2(m-3) |
| (m+3)(m-3) |
| 12-2(m+3)+2(m-3) |
| (m+3)(m-3) |
| 12-2m-6+2m-6 |
| (m+3)(m-3) |