Question

Condition for real roots of a cubic equation

Answer 1

Conditions for distinct real roots ofcubic polynomials. Given a cubicpolynomial with real coefficients of the form f ( x ) = A x 3 + B x 2 + C x + D ( A ≠ 0 ) I am trying to determine what the necessary conditions of the coefficients are so that has exactly three distinct real roots

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