题目内容
已知:
=
+
,则A=______,B=______.
| 3x-5 |
| x2-2x-3 |
| A |
| x-3 |
| B |
| x+1 |
| A |
| x-3 |
| B |
| x+1 |
| Ax+A+Bx-3B |
| (x-3)(x+1) |
| (A+B)x+(A-3B) |
| x2-2x-3 |
已知:
| 3x-5 |
| x2-2x-3 |
| A |
| x-3 |
| B |
| x+1 |
|
|
即A=1,B=2.
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题目内容
| 3x-5 |
| x2-2x-3 |
| A |
| x-3 |
| B |
| x+1 |
| A |
| x-3 |
| B |
| x+1 |
| Ax+A+Bx-3B |
| (x-3)(x+1) |
| (A+B)x+(A-3B) |
| x2-2x-3 |
| 3x-5 |
| x2-2x-3 |
| A |
| x-3 |
| B |
| x+1 |
|
|