Proving the quadratic formula using calculus? (just my attempt) @blackpenredpen
Proving the quadratic formula using calculus? (just my attempt) @blackpenredpen
Uploaded April 2026 | Updated September 2026, 2 weeks ago
I have been wondering if we could prove the quadratic formula using calculus, so here's what I came up with. It still involves mostly algebra but I will try to see if I can use Newton's method of doing so soon!

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Proving the quadratic formula using calculus? (just my attempt)

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