Solutions of the equation Ax2 ¡ By2 = C
We will present a general method for solving the equation
(2) Ax2 ¡ By2 = C
In the special case C = 1, the equation (2) was studied in [1].
Theorem 1. Let A, B be positive integers such that AB is not a perfect
square and let C be a nonzero integer. If the equations u2 ¡ABv2 = C and
Aq2 ¡ Bt2 = 1 are solvable, then (2) is also solvable and all its solutions
(x; y) are given by