题目内容
求代数式的值:
÷
+(x+2),其中x=
.
| x2-2x |
| x2-4 |
| 2x |
| x+2 |
| 1 |
| 2 |
| x2-2x |
| x2-4 |
| 2x |
| x+2 |
=
| x(x-2) |
| (x+2)(x-2) |
| x+2 |
| 2x |
=
| 1 |
| 2 |
=x+
| 5 |
| 2 |
当x=
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 2 |
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题目内容
| x2-2x |
| x2-4 |
| 2x |
| x+2 |
| 1 |
| 2 |
| x2-2x |
| x2-4 |
| 2x |
| x+2 |
| x(x-2) |
| (x+2)(x-2) |
| x+2 |
| 2x |
| 1 |
| 2 |
| 5 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 2 |