题目内容
计算与化简
(1)(
+
)÷
(2)a2
+3a
-
.
(1)(
48 |
1 |
4 |
12 |
27 |
(2)a2
8a |
50a3 |
a |
2 |
18a3 |
(1)原式=(4
+
)÷3
=
×
;
(2)原式=2a2
+3a•5a
-
×3a
=
.
3 |
| ||
2 |
3 |
=
9
| ||
2 |
1 | ||
3
|
|
3 |
2 |
(2)原式=2a2
2a |
2a |
a |
2 |
2a |
=
31a2 |
2 |
2a |
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