+0  
 
+4
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bx^2-(a-b)x-a=0

 Oct 21, 2015
 #1
avatar+12531 
+5

Hallo guest

laugh

 Oct 21, 2015
 #2
avatar+130560 
0

Very nice, Omi67....!!!!!!

 

 

 

cool cool cool

 Oct 21, 2015

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