\[\boxed{\text{82\ (82).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[Пусть\ a = n;\ \ b = 3n;\ \ c = 2n.\]
\[Получаем\ трехчлен:\]
\[nx^{2} + 3nx + 2n = 0\]
\[D = 9n^{2} - 8n^{2} = n^{2} > 0\]
\[x_{1} = \frac{- 3n - n}{2n} = - \frac{4n}{2n} = - 2;\ \ \ \ \ \]
\[x_{2} = \frac{- 3n + n}{2n} = - \frac{2n}{2n} = - 1.\]
\[nx^{2} + 3nx + 2n =\]
\[= n(x + 2)(x + 1).\]