题目内容
解方程:
+
=
| x2+2x |
| x2-1 |
| 5 |
| x-1 |
| x+4 |
| x+1 |
| x2+2x |
| x2-1 |
| 5 |
| x-1 |
| x+4 |
| x+1 |
x2+2x+5(x+1)=(x+4)(x-1)(2分)
4x=-9(3分)
x=-
| 9 |
| 4 |
检验:x=-
| 9 |
| 4 |
所以x=-
| 9 |
| 4 |
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相关题目
题目内容
| x2+2x |
| x2-1 |
| 5 |
| x-1 |
| x+4 |
| x+1 |
| x2+2x |
| x2-1 |
| 5 |
| x-1 |
| x+4 |
| x+1 |
| 9 |
| 4 |
| 9 |
| 4 |
| 9 |
| 4 |