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Formalas to Remember

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
x2 + y2   (x+y)(x-y)  
x2 + 2xy + y2   (x+y)(x+y)  
x2 + 2xy + y2   (x-y)(x-y)  
   


   


 

 

 
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Created by: leeumar on 2009-10-01




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