题目内容
计算或化简:
(1)(2
-3
)×
(2)a
-2a2
+3
.
(1)(2
| 12 |
|
| 6 |
(2)a
| 8a |
|
| 2a3 |
(1)原式=2
-3
=12
-3
=9
;
(2)原式=a
-2a2×
+3a
=2a
-
+3a
=
.
| 12×6 |
|
=12
| 2 |
| 2 |
=9
| 2 |
(2)原式=a
| 8a |
| ||
| 4a |
| 2a |
=2a
| 2a |
a
| ||
| 2 |
| 2a |
=
9a
| ||
| 2 |
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