题目内容
解方程:
+
=2.
| 2x |
| x+2 |
| 3 |
| 2-x |
| 2x |
| x+2 |
| 3 |
| 2-x |
| 2x |
| x+2 |
| 3 |
| x-2 |
方程两边同时乘以(x+2)(x-2)得:
2x(x-2)-3(x+2)=2(x+2)(x-2),
整理得:2x2-4x-3x-6=2x2-8,
即7x-2=0,
解得:x=
| 2 |
| 7 |
经检验x=
| 2 |
| 7 |
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题目内容
| 2x |
| x+2 |
| 3 |
| 2-x |
| 2x |
| x+2 |
| 3 |
| 2-x |
| 2x |
| x+2 |
| 3 |
| x-2 |
| 2 |
| 7 |
| 2 |
| 7 |