Sharaf al-Dīn al-Ṭūsī (? in Tus, Iran – 1213/4) developed a novel approach to the investigation of cubic equations—an approach which entailed finding the point at which a cubic polynomial obtains its maximum value.
Sharaf al-Dīn al-Ṭūsī (? di Tus, Iran – 1213/4) mengembangkan pendekatan baru terhadap penelitian persamaan kubus, suatu pendekatan untuk mencari titik tempat polinomial kubus mencapai nilai maksimumnya.