Engineering↗
Cubic and Higher-Degree Equations
Finding one root, dividing it out, and finishing with the quadratic that remains - plus what to do when the cubic has no rational root.
Every page in the KEVOS library tagged factor theorem. 2 pages.
Finding one root, dividing it out, and finishing with the quadratic that remains - plus what to do when the cubic has no rational root.
Why the remainder on dividing by x - a is exactly f(a), how that turns into a factor test, and how the two together factor a cubic without guesswork.