Question

Giải phương trình nghiệm nguyên:

x²-y²=1998

Answer 1

https://hoc24.vn/cau-hoi/chung-minh-rang-phuong-trinh-sau-khong-co-nghiem-nguyena-x2-y21998b-x2y21994.262907021445

Answer 2

y² = x² - 1998

x² = 1998 + y²

y = \(\sqrt{x^2-1998}\)

x = \(\sqrt{1998+y^2}\)

y = x - \(\sqrt{1998}\)

x = y + \(\sqrt{1998}\)