Брамагупта — разлика између измена

{{Цитат|Апсолутном броју помноженим четири пута [коефицијентом] квадрата, додај квадрат [коефицијента] средњег члана; квадратни корен овога, мање [коефицијент] средњег члана подељен двоструким [коефицијентом] квадрата је вредност. -{(''Brahmasphutasiddhanta'' (Colebrook translation. (1817). стр. 346)}-<ref name=stillwell-p87>{{Cite bookharvnb|last=Stillwell|first=John|year=2004|title=Mathematics and its History|location=Berlin and New York|publisher=Springer-Verlag|pagesp=87}}</ref>}}

У области [[Индијска астрономија|астрономије]], Брамагупта је први користио алгебру у решавању астрономских проблема.<ref>{{citeCite book|last=Teresi|first=Dick|title=Lost Discoveries: The Ancient Roots of Modern Science |publisher=Simon and Schuster |year=2002|id=ISBN 0-7432-4379-X |pages=135}}</ref><ref name=hayashi2003-p119>{{harvnb|Hayashi|2003|p=119}}</ref> Кроз дело ''Брамаспутасиданта'' су се Арапи упознали са индијском астрономијом. Чувени [[Абасиди|абасидски]] халиф, [[Ел Мансур]] (712—775.) је основао [[Багдад]], и учинио га центром науке. Он је позвао учењака по имену Канках из Уџаина 770. године. Он је користио књигу ''Брамаспутасиданта'' да објасни хинду систем аритметичке астрономије. [[Ал-Фазари]] је превео ово дело на арапски по захтеву халифа.

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