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May 17th, 2015, 09:19 AM   #1
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Permutations

(a+b)P3=x

and

(a-b)P2=y

find x+y
mared is offline  
 
May 17th, 2015, 11:43 AM   #2
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Hello, mared!

Quote:










I'll let you simplify it.

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