The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 10.1623\\[1 em]x_2 &= 3.8377 \end{aligned} $$The solutions of $ x^2-14x+39 = 0 $ are: $ x = 7-\sqrt{ 10 } ~ \text{and} ~ x = 7+\sqrt{ 10 }$.
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