题目内容
计算(
-
)÷
的结果是( )
| x |
| x-2 |
| x |
| x+2 |
| 4x |
| 2-x |
A.
| B.-
| C.-1 | D.1 |
原式=
÷
=
×
=-
,故选B.
| x(x+2)-x(x-2) |
| (x-2)(x+2) |
| 4x |
| 2-x |
| 4x |
| (x-2)(x+2) |
| 2-x |
| 4x |
| 1 |
| x+2 |
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相关题目
计算(
-
)÷
的结果是( )
| x |
| x-2 |
| x |
| x+2 |
| 4x |
| 2-x |
A、
| ||
B、-
| ||
| C、-1 | ||
| D、1 |