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Oct 25, 2015 at 7:10 vote accept joaopa
Oct 25, 2015 at 6:49 comment added individ Below is a formula which proves that infinitely many solutions. Formally, the task is already solved.
Oct 25, 2015 at 6:45 comment added joaopa Individ. I am interested in a formula. Can you give one?
Oct 25, 2015 at 5:00 answer added joro timeline score: 3
Oct 25, 2015 at 4:41 comment added individ It's all in the coefficient of $x$. When he is alone, then infinitely many solutions. The solutions can be expressed using equations Pell. The formula is rather long. Here not welcome a long formula and don't know if there is a point lead.
Oct 25, 2015 at 4:10 history asked joaopa CC BY-SA 3.0