Neat Math Multiplication Tip!

in dmania •  7 years ago  (edited)

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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!!

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Thanks for the heads up!

Great tip! I love "formulas" like this