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化简的结果是( ) A.a2-b2 B.a+b C.a-b D.1
化简
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193851288812631/SYS201311011938512888126006_ST/0.png)
的结果是( )
A.a
2-b
2B.a+b
C.a-b
D.1
考点分析:
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