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Omar Khayyam's Algebra

This is a page from a manuscript of the *Algebra* (*Maqalah fi al-jabra wa-al muqabalah*) of Omar Khayyam (1048-1131). This work is known for its solution of the various cases of the cubic equation by finding the intersections of appropriately chosen conic sections. On this page, Omar is discussing the case "a cube, sides and numbers are equal to squares", or, in modern notation, x^{3} + cx + d = bx^{2}. Read more about Omar Khayyam's Algebra.
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