\[\frac{x^{2} - (3a + 3)x + 2a^{2} + 3a}{x - 2} = 0\]
\[ОДЗ:x \neq 2.\]
\[x^{2} - (3a + 3)x + 2a^{2} + 3 = 0\]
\[Уравнение\ имеет\ один\ \ \]
\[корень\ при\ D = 0:\]
\[D = (3a + 3)^{2} - 4\left( 2a^{2} + 3a \right) =\]
\[= 9a^{2} + 18a + 9 - 8a^{2} - 12a =\]
\[= a^{2} + 6a + 9 = (a + 3)^{2}\]
\[(a + 3)^{2} = 0\]
\[a = - 3.\]
\[Ответ:при\ a = - 3.\]