Brahmagupta was born c. 598, in Bhillamala, which was located in Northwestern India. The suffix “-gupta” probably indicated that the family belonged to the Vaisya caste (made up of mostly farmers and merchants). He likely lived the majority of his life in Ujjain, India, which at the time was the center of Hindu astronomy and mathematics. There he had access to the best observatory in India as well as the writings of many great scientists and …showed first 75 words of 647 total…

…showed last 75 words of 647 total…able to use the four quadrants, because negative representations exist in them. He also created rules on how negative numbers relate to positive numbers with multiplication. Today we use these relations a lot. Not to mention we would not have Brahmagupta’s Formula, and countless other equations that he worked on or fixed existing mistakes. Those preceding reasons are why Brahmagupta is a great influence on modern mathematics, and why we need his works today.