Which of the following Pell equations has (3,2)(3, 2)(3,2) as an integer solution?
x2−2y2=1x^2 - 2y^2 = 1x2−2y2=1
x2−3y2=1x^2 - 3y^2 = 1x2−3y2=1
x2−4y2=1x^2 - 4y^2 = 1x2−4y2=1
x2−y2=5x^2 - y^2 = 5x2−y2=5