show that n square minus 1 is divisible by 8 if n is an odd positive integer
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to prove it we may take an odd positive integer 9.
so (9)2 is 81 and 81-1 is 80 which is divisible by 8
hope it helps..
so (9)2 is 81 and 81-1 is 80 which is divisible by 8
hope it helps..
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