题目内容
(1)计算:(
-
)•
;(2)分解因式:-a-2a2-a3.
| 3x |
| x-2 |
| x |
| x+2 |
| x2-4 |
| x |
(1)原式=
•
=2x+8;
(2)原式=-a(a2+2a+1)=-a(a+1)2.
| x(2x+8) |
| x2-4 |
| x2-4 |
| x |
(2)原式=-a(a2+2a+1)=-a(a+1)2.
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题目内容
| 3x |
| x-2 |
| x |
| x+2 |
| x2-4 |
| x |
| x(2x+8) |
| x2-4 |
| x2-4 |
| x |