\[2x^{2} + x - 3 = 2 \cdot (x - 1)\left( x + \frac{3}{2} \right) =\]
\[= (x - 1)(2x + 3)\]
\[D = 1 + 24 = 25\]
\[x_{1} = \frac{- 1 + 5}{4} = 1;\]
\[x_{2} = \frac{- 1 - 5}{4} = - \frac{6}{4} = - \frac{3}{2}.\]