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RE: Neat Math Multiplication Tip!
because (a*a) = a^2
and ( (a+1) * (a-1) ) = (a^2 - 1^2) = a^2 - 1
[3rd binomial formula]
because (a*a) = a^2
and ( (a+1) * (a-1) ) = (a^2 - 1^2) = a^2 - 1
[3rd binomial formula]
Great work on the proof!!