Найти целые значения уравнения x^2-xy-2y^2=1. помогите !!)
Решите задачу:
http://tex.z-dn.net/?f=x%5E2-xy-2y%5E2%3D1%2C+%5C%5C+x%5Cin+Z%2C+y%5Cin+Z%3B+%5C%5C%0Ax%5E2-2%5Ccdot+x%5Ccdot%5Cfrac%7B1%7D%7B2%7Dy%2B%28%5Cfrac%7B1%7D%7B2%7Dy%29%5E2-%28%5Cfrac%7B1%7D%7B2%7Dy%29%5E2-2y%5E2%3D1%2C+%5C%5C+%0A%28x-%5Cfrac%7B1%7D%7B2%7Dy%29%5E2-%5Cfrac%7B1%7D%7B4%7Dy%5E2-2y%5E2%3D1%2C+%5C%5C+%0A%28x-%5Cfrac%7B1%7D%7B2%7Dy%29%5E2-%5Cfrac%7B9%7D%7B4%7Dy%5E2%3D1%2C+%5C%5C+%28x-%5Cfrac%7B1%7D%7B2%7Dy%29%5E2-%28%5Cfrac%7B3%7D%7B2%7Dy%29%5E2%3D1%2C+%5C%5C+%28x-%5Cfrac%7B1%7D%7B2%7Dy-%5Cf