\[6 \cdot \left( 4x^{2} + x \right) - 3 \cdot (5x - 1) =\]
\[= 2 \cdot \left( x^{2} + 17 \right)\]
\[24x^{2} + 6x - 15x + 3 =\]
\[= 2x^{2} + 34\]
\[24x^{2} - 9x + 3 - 2x^{2} - 34 = 0\]
\[22x² - 9x - 31 = 0\ \]
\[D = b^{2} - 4ac =\]
\[= 81 - 4 \cdot 22 \cdot ( - 31) =\]
\[= 81 + 2728 = 2809\]
\[x_{1} = \frac{9 + 53}{44} = \frac{62}{44} = \frac{31}{22} = 1\frac{9}{22}\]
\[x_{2} = \frac{9 - 53}{44} = - \frac{44}{44} = - 1\]
\[Ответ:x_{1} = 1\frac{9}{22};\ \ x_{2} = - 1.\]