\[- 3x^{2} + 10x - 3 = 0\ \]
\[D = 100 - 36 = 64\]
\[x_{1,2} = \frac{- 10 \pm 8}{- 6}\]
\[x_{1} = \frac{- 2}{- 6} = \frac{1}{3};\ \ \ \ x_{2} = \frac{- 18}{- 6} = 3.\]