$Tìm n sao cho n^{2} - 5n - 25 là số nguyên tố$
Edited by minhhien2001, 20-11-2014 - 07:46.
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$Tìm n sao cho n^{2} - 5n - 25 là số nguyên tố$
Edited by minhhien2001, 20-11-2014 - 07:46.
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