Mathematics in Ancient and Medieval India c7.s5.154

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c7.s5.154

The equation Nx² + 1 = y² is known by mistake now a days as Pell's equation ( c. 1668 A. D. ). The equation must be known as Brahmagupta–Bhāskara equation, for Bhāskara II gave a satisfactory solution of the nearly solved method of Brahmagupta. Lagrange gave a complete solution of the equation in 1767 A. D. with the help of continued fraction.

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