题目内容
如果
+
=
,则A=______;B=______.
| A |
| x-5 |
| B |
| x+2 |
| 5x-4 |
| x2-3x-10 |
| A |
| x-5 |
| B |
| x+2 |
| A(x+2)+B(x-5) |
| x2-3x-10 |
| 5x-4 |
| x2-3x-10 |
∴(A+B)x+2A-5B=5x-4,
∴A+B=5,2A-5B=-4,
解得:A=3,B=2.
故答案为:3,2.
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题目内容
| A |
| x-5 |
| B |
| x+2 |
| 5x-4 |
| x2-3x-10 |
| A |
| x-5 |
| B |
| x+2 |
| A(x+2)+B(x-5) |
| x2-3x-10 |
| 5x-4 |
| x2-3x-10 |