1 int reducedQuarticRoots(const double t4, const double t3, const double t2, const double t1,
2 const double t0, const bool oneHint, double s[4]);
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4 int quarticRootsReal(int firstCubicRoot, const double A, const double B, const double C,
5 const double D, const double E, double s[4]);
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