题目内容
通分:
(1)
与-
;
(2)
与
.
(1)
| c |
| a2b4 |
| a2 |
| bc3 |
(2)
| 1 |
| x2-4 |
| x |
| 4-2x |
(1)
=
,-
=-
;
(2)
=
=
,
=-
=-
;
| c |
| a2b4 |
| c4 |
| a2b4c3 |
| a2 |
| bc3 |
| a4b3 |
| a2b4c3 |
(2)
| 1 |
| x2-4 |
| 1 |
| (x+2)(x-2) |
| 2 |
| 2(x+2)(x-2) |
| x |
| 4-2x |
| x |
| 2(x-2) |
| x(x+2) |
| 2(x+2)(x-2) |
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