History of Hindu Mathematics: A Source Book v2.c17.s8.48

v2.c17.s8.48

³ “Caturâhatavargasamai rūpaiḥ pakṣadvayaṁ guṇayet, Avyaktavargarūpairyuktau pakṣau tato mūlam.” This is the reading of Śrīdhara’s rule as stated by Jñānarāja and Sūryadāsa and accepted also by Sudhakara Dvivedi. But according to the reading of Kṛṣṇa (*c.* 1580) and Râmakṛṣṇa (*c.* 1648), which has been accepted by Colebrooke, the second line of the verse should be “Pūrvâvyaktasya kṛteḥ samarūpāṇi kṣipet tayoreva” or “add to them known quantities equal to the square of the original coefficient of the unknown.”