Authors: Florentin Smarandache
We consider the equation (1) ax2 - by2 + c = 0, with a,b ε N* and c ε Z*. It is a generalization of Pell's equation: x2 -Dy2 = 1. Here, we show that: if the equation has an integer solution and a.b is not a perfect square, then (1) has an infinitude of integer solutions; in this case we find a closed expression for (xn,yn), the general positive integer solution, by an original method. More, we generalize it for any Diophantine equation of second degree and with two unknowns.
Comments: 10 pages.
[v1] 13 Mar 2010
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