2. Brahmagupta’s Method of Multiplication - Deepstash

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2. Brahmagupta’s Method of Multiplication

He proposed a method of multiplication, “gomutrika”, in his book “Brahmasphutasiddhanta”. The title of this method was translated by Ifrah as, “Like the trajectory of cow’s urine”. In the 12th chapter of his book, he also tried to explain the rules of simplifying five types of combinations of fractions:-

ac + bc; ac × bd; a1 + bd; ac + bd × ac = a(d + b)cd; and ac − bd × ac = a(d − b)cd. 

Let us try to multiply 315 by 306 with the help of the gomutrika method in the Link Attached above.

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