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Completing the Square for finding the general solution for a quadratic equation by using a two dimensional drawing is easy. Since we can not so easily draw a three dimensional figure to help in finding a solution to a cubic equation, has any clever mathematician ever found a three dimensional physical model to help in deriving a solution to a general cubic equation?
I ask because, the method of producing the solution seems to rely on a bunch of new variables without showing clearly how and why it all works. So very different from understanding the quadratic equations.
I ask because, the method of producing the solution seems to rely on a bunch of new variables without showing clearly how and why it all works. So very different from understanding the quadratic equations.