If d is negative, the equation can have only a finite number of solutions. If d is a perfect square, i.e. d = a 2 , the equation reduces to (x − ay) (x + ay) = N and there is only a finite number of solutions
If d is negative, the equation can have only a finite number of solutions. If d is aperfect square, i.e. d = a2, the equation reduces to (x − ay) (x + ay) = N and thereis only a finite number of solutions