\[(2x - 1)(x + 3) = 0\]
\[2x - 1 = 0\ \ \ \ \ \ \ \ \ \ \ x + 3 = 0\]
\[2x = 1\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = - 3\]
\[x = 0,5\]
\[Ответ:x = - 3;\ \ x = 0,5.\]