题目内容
计算:
(1)
÷
×
.
(2)(
a
+6a
)-(b
-a2
).
(1)
1
|
2
|
1
|
(2)(
| 2 |
| 3 |
| 9a |
|
|
|
(1)原式=
=1;
(2)原式=2a
+6
-2
+a
=3a
+4
.
|
=1;
(2)原式=2a
| a |
| ab |
| ab |
| a |
=3a
| a |
| ab |
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题目内容
1
|
2
|
1
|
| 2 |
| 3 |
| 9a |
|
|
|
|
| a |
| ab |
| ab |
| a |
| a |
| ab |