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Keywords: Omar Kayyám - Geometric solution to cubic equation.svg en Omar Kayyám's Geometric solution to cubic equation To solve the third-degree equation x 3 + a 2x b Khayyám constructed the parabola x 2 ay a circle with diameter b/a 2 and a vertical line through the intersection point The solution is given by the length of the horizontal line segment from the origin to the intersection of the vertical line and the x-axis own Pieter Kuiper 2011-03-15 SimplSVG Omar Khayyam Cubic polynomials |