(2008•遵义)现有三个多项式:
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a
2+a-4,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/201310201203347623822373/SYS201310201203347623822018_ST/1.png)
a
2+5a+4,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/201310201203347623822373/SYS201310201203347623822018_ST/2.png)
a
2-a,请你选择其中两个进行加法运算,并把结果因式分解.
考点分析:
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