\[(x + 3) \cdot (x - 4) = 0\ \]
\[x + 3 = 0\ \ \ \ \ \ \ \ \ \ \ x - 4 = 0\]
\[x = - 3\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = 4\]
\[Ответ:\ - 3,\ 4.\]