题目内容
化简-3x-[4x-(-9x+
)-2]的结果是
- A.-16x+
- B.-16x+
- C.-16x-
- D.10x+
B
分析:原式去括号合并即可得到结果.
解答:-3x-[4x-(-9x+
)-2]=-3x-(4x+9x-
-2)=-3x-4x-9x+
+2=-16x+
.
故选B
点评:-3x-[4x-(-9x+
)-2]=-3x-(4x+9x-
-2)=-3x-4x-9x+
+2=-16x+
.
分析:原式去括号合并即可得到结果.
解答:-3x-[4x-(-9x+
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/259.png)
故选B
点评:-3x-[4x-(-9x+
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/13.png)
![](http://thumb.1010pic.com/pic5/latex/259.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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