A Cubic Solution of Omar Khayyam
- John Golden
In the 11th century, Omar Khayyam classified all known cubics and gave geometric solutions for them. Shown here is one of his simpler cases, the solution of a cubic plus sides (linear term) equal to a number. Amazingly, Khayyam did not have graphing to do this, but constructed his parabolas geometrically. Luckily we have GeoGebra!
More GeoGebra at mathhombre.blogspot.com.