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Description: Technique pas d'art:nUsually, the coefficients a, b,c, d are real numbers. However, most of the theory is also valid if they belong to any field of characteristic other than 2 or 3. To solve a cubic equation is to find the roots (zeros) of a cubic function. There are various ways to solve a cubic equation. The roots of a cubic, like those of a quadratic or quartic (fourth degree) function but no higher degree function (by the Abel–Ruffini theorem), can always be found algebraically (as a formu
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