$$6x^3+7x^2+19 = 0$$
Answer
$$ \begin{matrix}x_1 = -1.97692 & x_2 = 0.40513+1.19904i & x_3 = 0.40513-1.19904i \end{matrix} $$
Explanation
This polynomial has no rational roots that can be found using Rational Root Test.
Roots were found using qubic formulas.
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