题目内容
计算:
(1)(a2+3)(a-2)-a(a2-2a-2).
(2)(
a5b3+
a7b4-
a5b5)÷
a5b3.
(1)(a2+3)(a-2)-a(a2-2a-2).
(2)(
| 3 |
| 5 |
| 9 |
| 5 |
| 9 |
| 2 |
| 3 |
| 4 |
(1)原式=a3-2a2+3a-6-a3+2a2+2a=5a-6;
(2)原式=
+
a2b-6b2.
(2)原式=
| 4 |
| 5 |
| 12 |
| 5 |
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