History of Hindu Mathematics: A Source Book v2.c17.s14.111

v2.c17.s14.111

"The two roots for the additive unity will now be found in a different way by the rule, 'Or divide twice an optional number by the difference between the square of that optional number and the *prakṛti* etc.' Here, in the first example, assume the optional number to be 3. Its square is 9; multiplier is 8; their difference is 1;