this post was submitted on 24 Oct 2025
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You know, I remember the formula, but I don't remember what a, b, and c are
They're the coefficients of a quadratic equation! Y = ax^2 + bx + c
0 = ax^2 + bx + c
Oh true!
They are all superfluous if you know how to do quadratic expansion.
Do you have a truly universal method for quadratic expansion that is easier to remember and compute than the formula? Don't get me wrong, I enjoy quadratic expansion and always give it a few shots before resorting to the formula.