回复：Maybe I am wrong. An Counterexample.

来源: cma 于 2012-03-11 13:04:23 [] [旧帖] [给我悄悄话] 阅读数 : (163 bytes)
本帖于 2012-06-08 15:17:10 时间, 由版主 idiot94 编辑
回答: Maybe I am wrong. An Counterexample. 由 wxcfan123 于 2012-03-11 12:04:18

Thanks.

But why 3y^2+286 is not square number?

suppose 3y^2+13, 13 has no factor of 3 and is not a square nubmer. But let y=1, it is 16=4*4.

请您先登陆，再发跟帖！