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Formula Forge
A reference of formulas and what each one is for.
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Quadratic Formula
Algebra
x = (−b ± √(b² − 4ac)) / 2a
Solves any equation of the form ax² + bx + c = 0. The part under the root (b² − 4ac) is the discriminant: positive means two real answers, zero means one, negative means none (real).
algebra