题目内容
化简(x+
)-(2x-
),所得结果是( )
| 1 |
| 4 |
| 1 |
| 2 |
A.-x-
| B.-x+
| C.3x-
| D.3x+
|
(x+
)-(2x-
)
=x+
-2x+
=x-2x+
+
=-x+
.
故选B.
| 1 |
| 4 |
| 1 |
| 2 |
=x+
| 1 |
| 4 |
| 1 |
| 2 |
=x-2x+
| 1 |
| 4 |
| 1 |
| 2 |
=-x+
| 3 |
| 4 |
故选B.
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相关题目
化简(x+
)-(2x-
),所得结果是( )
| 1 |
| 4 |
| 1 |
| 2 |
A、-x-
| ||
B、-x+
| ||
C、3x-
| ||
D、3x+
|