Muhammad ibn Musa al-Khwarizmi

Muḥammad ibn Mūsā al-Khwārizmī (; c. 780 – c. 850) ni mlembi uyo wakalemba mabuku ghanandi pa nkhani ya masamu, sayansi ya vya mu mlengalenga, na charu. Mu 820 C.E., wakasankhika kuŵa mulembi wa vya mu mlengalenga kweniso mulongozgi wa layibulare ya Nyumba ya Vinjeru ku Baghdad.:14

Buku la Al-Khwarizmi lakuyowoya vya masamu (The Compendious Book on Calculation by Completion and Balancing, c. 813833 CE:171) ndiyo wakambiska nthowa yakwamba yakumazgira ma equation gha linear na quadratic. Cimoza mwa vinthu ivyo wakacita pa nkhani ya masamu nchakuti wakalongora umo wangamazgira ma equation gha quadratic mwa kumalizga chigaŵa, ndipo wakapeleka vifukwa vyakupulikikwa.:14