题目内容
化简
(1)a2
+3a
(2)(
-2
+
)•
.
(1)a2
| 8a |
| 50a3 |
(2)(
| xy |
|
|
| xy |
(1)原式=a2•2
+3a•5a
=2a2
+15a2
=17a2
(2)原式=
•
-2
•
+
•
=xy-2y+x
| 2a |
| 2a |
=2a2
| 2a |
| 2a |
=17a2
| 2a |
(2)原式=
| xy |
| xy |
|
| xy |
|
| xy |
=xy-2y+x
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