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1 byte added ,  12:12, 15 February 2014
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Step 8 : =
 
Step 8 : =
 
#
 
#
=hints for dificult problem=
+
=hints for difficult problem=
    
=====If  x+y=a  and xy=b then prove that                                          (1+)+(1+) =  
 
=====If  x+y=a  and xy=b then prove that                                          (1+)+(1+) =  

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