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. 

From the Rare Book and Manuscript Collection at Columbia University.

Part of the Mathematical Treasures section of Loci: Convergence.