\[\boxed{\text{175\ (175).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
\[\mathbf{Числовые\ промежутки.}\]
Решение.
\[1)\ \lbrack - 12;\ - 6\rbrack,\ \ \]
\[x_{\min} = - 12;\ \ \]
\[x_{\max} = - 6.\]
\[2)\ (5;11\rbrack,\ \ \]
\[x_{\min} = 6;\]
\[x_{\max} = \ 11.\]
\[3)\ ( - 10,8;1,6\rbrack,\ \ \]
\[x_{\min} = - 10;\]
\[x_{\max} = 1.\]
\[4)\ \lbrack - 7,8;\ - 2,9\rbrack,\ \ \]
\[x_{\min} = - 7;\]
\[x_{\max} = - 3.\]