\[\frac{2x^{2} - 5x - 3}{3 - x} =\]
\[= - \frac{(2x + 1)(x - 3)}{x - 3} = - 2x - 1.\]
\[2x^{2} - 5x - 3 =\]
\[= 2(x + 0,5)(x - 3) =\]
\[= (2x + 1)(x - 3)\]
\[D = 25 + 24 = 49\]
\[x_{1} = \frac{5 + 7}{4} = 3;\]
\[x_{2} = \frac{5 - 7}{4} = - \frac{2}{4} = - 0,5.\]