题目内容
当x=2时,
÷
-
=______.
| 3x-3 |
| x2-1 |
| 3x |
| x+1 |
| 1 |
| x-1 |
原式=
•
-
=
-
=
=-
,
当x=2时,原式=-
.
故答案是:-
.
| 3(x-1) |
| (x+1)(x-1) |
| x+1 |
| 3x |
| 1 |
| x-1 |
=
| 1 |
| x(x-1) |
| x |
| x(x-1) |
=
| 1-x |
| x(x-1) |
=-
| 1 |
| x |
当x=2时,原式=-
| 1 |
| 2 |
故答案是:-
| 1 |
| 2 |
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