Вопрос:

Ответ:

\[m^{2} + 8m - 9 = 0\]

\[m_{1} + m_{2} = - 8\]

\[m_{1} \cdot m_{2} = - 9\]

\[\Longrightarrow m_{1} = - 9;\ \ m_{2} = 1.\]

\[m^{2} + 8m - 9 = (m + 9)(m - 1).\]

\[m^{2} + 12m + 27 = 0\]

\[m_{1} + m_{2} = - 12\]

\[m_{1} \cdot m_{2} = 27\]

\[\Longrightarrow m_{1} = - 9;\ \ m_{2} = - 3.\]

\[m^{2} + 12m + 27 =\]

\[= (m + 9)(m + 3).\]