SOLUTION: Compute 123456789^2-2*123456789*123456787+123456787^2 without a calculator.

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Question 1019654: Compute 123456789^2-2*123456789*123456787+123456787^2 without a calculator.
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
A= 123456789
B= 123456787
And your problem says
A^2-2AB+B^2
which factors to
(A-B)(A-B)
We can see that A-B=2 above so the answer is 4.