题目内容
计算(
-
)•
=______.
| 3x |
| x-2 |
| x |
| x+2 |
| x2-4 |
| x |
(
-
)•
=
•
=2x+8.故答案为2x+8.
| 3x |
| x-2 |
| x |
| x+2 |
| x2-4 |
| x |
| 3x2+6x-x2+2x |
| x2-4 |
| x2-4 |
| x |
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相关题目
计算
+
-
得( )
| 3x |
| x-4y |
| x+y |
| 4y-x |
| 7y |
| x-4y |
A、-
| ||
B、
| ||
| C、-2 | ||
| D、2 |