The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 3\\[1 em]x_2 &= \dfrac{ 4 }{ 3 } \end{aligned} $$Step 1:
Get rid of fractions by multipling equation by $ \color{blue}{ 5 } $.
$$ \begin{aligned} -\frac{6}{5}x^2+\frac{26}{5}x-\frac{24}{5} & = 0 ~~~ / \cdot \color{blue}{ 5 } \\[1 em] -6x^2+26x-24 & = 0 \end{aligned} $$Step 2:
The solutions of $ -6x^2+26x-24 = 0 $ are: $ x = \dfrac{ 4 }{ 3 } ~ \text{and} ~ x = 3$.
You can use step-by-step quadratic equation solver to see a detailed explanation on how to solve this quadratic equation.