Brahmagupta's problem

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This problem was given in India by the mathematician Brahmagupta in 628 in his treatise Brahma Sputa Siddhanta:

Solve the Pell equation

\ x^2 - 92y^2 = 1

in integers.

Brahmagupta gave the smallest solution as

\ x = 1151, y = 120

[edit] See also

[edit] External links

Eric W. Weisstein, Brahmagupta's Problem at MathWorld.