History of Hindu Mathematics: A Source Book v2.c17.s25.11
History of Hindu Mathematics: A Source Book v2.c17.s25.11
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v2.c17.s25.11
That is, \begin{align*} x &= 2(p⁴ + p²), \\ y &= 2(p⁴ - p²), \end{align*} where p is any rational number.