题目内容
计算:(1)
-
=______;
(2)
+
=______.
| 1 |
| 2x |
| 1 |
| x |
(2)
| b2 |
| a2-b2 |
| b2 |
| b2-a2 |
(1)原式=
=-
;
(2)原式=
=0.
| 1-2 |
| 2x |
| 1 |
| 2x |
(2)原式=
| b2-b2 |
| a2-b2 |
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题目内容
| 1 |
| 2x |
| 1 |
| x |
| b2 |
| a2-b2 |
| b2 |
| b2-a2 |
| 1-2 |
| 2x |
| 1 |
| 2x |
| b2-b2 |
| a2-b2 |