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Al-Khwarizmi's Algebra
Page from al-Khwarizmi's algebra text written in about 825. The proof of the rule for solving a quadratic equation of the form "squares plus roots equal numbers".
From the Rare Book and Manuscript Collection at Columbia University.
Part of the Mathematical Treasures section of Loci: Convergence.
Go to the photo page
Frank J. Swetz, Victor J. Katz, "Al-Khwarizmi's Algebra," Convergence (November 2008)
