Numerical Analysis
Deriving the Quadratic Equation From the Roots Up
Solving Quadratics using gradients at the roots
Approximation
Numerical Analysis
The Simplest Cubic Root
A very simple Cubic polynomial root approximation using architectural symmetry and similar triangles
Numerical Analysis
Cubic Polynomials - Rotation to Calculate Roots
Exploiting the amazing symmetry of cubic polynomials to quickly find the first root using Newton’s method.