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"That's hilarious, since the quadratic formula is just what you get by solving ax^2 + bx + c = 0 by completing the square." That is one way to derive it, but t
by betterunix2 6y ago
"That's hilarious, since the quadratic formula is just what you get by solving ax^2 + bx + c = 0 by completing the square."
That is one way to derive it, but there are others, including my personal favorite, the resolvents method (which also works for deriving cubic and quartic formulas).