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Old 2020-09-10, 09:21   #12
Alberico Lepore
 
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May 2017
ITALY

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before understanding this

Quote:
Originally Posted by retina View Post
Well go on then, have at it.
I have to understand this

Quote:
Originally Posted by Alberico Lepore View Post
What characteristic must N have for that equality to be true

for example for N = 121

this

2 * 121 + 2 * 1 ^ 2 + y ^ 2- (22) ^ 2 = 0

it's not true

that is, y is not integer
would you give me a little clue
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