Source: https://ent2d.ac-bordeaux.fr/disciplines/semaine-des-maths/wp-content/uploads/sites/17/2017/03/Al-Khwarizmi-Traduction-Al-Kit%C4%81b-al-mokhtasar-fi-his%C4%81b-al-jabr-wa-l-moq%C4%81bala.pdf