题目内容
已知a=-
,b=-
,化简:
-
-
求值.
| 1 |
| 2 |
| 1 |
| 3 |
| |2a+4b| |
| (a+2b)2 |
| 4 |
| |a+2b| |
| 2 |
| |4b+3|-|2a-3| |
∵a=-
,b=-
,
∴原式=
+
-
=
-
=0.
| 1 |
| 2 |
| 1 |
| 3 |
∴原式=
| -2(a+2b) |
| (a+2b)2 |
| 4 |
| a+2b |
| 2 |
| 4b+3+2a-3 |
| 2 |
| a+2b |
| 2 |
| a+2b |
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