题目内容
计算(1-
)•
.
| 3 |
| x+2 |
| x |
| x-1 |
原式=
•
=
=
.
故答案为
.
| x+2-3 |
| x+2 |
| x |
| x-1 |
=
| x(x-1) |
| (x+2)(x-1) |
=
| x |
| x+2 |
故答案为
| x |
| x+2 |
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题目内容
| 3 |
| x+2 |
| x |
| x-1 |
| x+2-3 |
| x+2 |
| x |
| x-1 |
| x(x-1) |
| (x+2)(x-1) |
| x |
| x+2 |
| x |
| x+2 |