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math definition for cubic equation. In algebra a cubic equation in one variable is an equation of the form in which a is nonzero. If all roots are real and distinct the discriminant is always positive.
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A general polynomial function has the form. In mathematics a cubic function is a function of the form f x a x 3 b x 2 c x d displaystyle fxax3bx2cxd where the coefficients a b c and d are real numbers and the variable x takes real values and a 0. The cubic contents of a vessel.
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Equations with an X4 set to 0 General formula for the equation is. The solutions of this equation are called roots of the cubic function defined by the left-hand side of the equation. This means that the highest exponent is always 3. It could easily be mentioned in many undergraduate math courses though it doesnt seem to appear in most textbooks used for those courses.
