Mathematics
Mathematics, 05.02.2021 19:50, skylerdemi1

PLEASE HELP ME Prove that for any natural of n the value of the expression:
(3n+1)^2-(3n-1)^2 is divisible by 12

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PLEASE HELP ME Prove that for any natural of n the value of the expression:
(3n+1)^2-(3n-1)^...

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