SOLUTION: The operation © is defined by a © b = a^2 – b^2. What is (2013 © 2012) © (2012 © 2011)?

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Question 710057: The operation © is defined by a © b = a^2 – b^2. What is (2013 © 2012) © (2012 © 2011)?
Answer by sachi(548) About Me  (Show Source):
You can put this solution on YOUR website!
a © b = a^2 – b^2=(a+b)(a-b)
(2013 © 2012) © (2012 © 2011)=[(2013+2012)(2013-2012)]©[(2012+2011)(2012-2011)]
=[4025]©[4023]=(4025+4023)(4025-4023)=8048*2=16096