Cubic equation
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In algebra, a cubic equation in one variable is an equation of the form a x 3 + b x 2 + c x + d = 0 in which a is not zero.
Niccolò Fontana Tartaglia
Omar Khayyam
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Omar Khayyam was a Persian poet and polymath, known for his contributions to mathematics, astronomy, philosophy, and Persian literature. He was born in Nishapur, Iran and lived during the Seljuk era,
Cubic equation
…quadratic (second-degree) and quartic (fourth-degree) equations, but not for higher-degree equations, by the Abel–Ruffini theorem.) geometrically: using Omar Khayyam's method. trigonometrically…
Statue of Khayyam by Abolhassan Sadighi, at Laleh Park in Tehran
Mausoleum of Omar Khayyam in Nishapur, Iran. Some of his rubáiyáts are used as calligraphic (taliq script) decoration on the exterior body of his mausoleum.
Inscription of a poem attributed to Omar Khayyam at Morića Han in Sarajevo, Bosnia and Herzegovina
Stamp of Albania in 1997, entitled "850th birth anniversary of Omar Khayyam"