\[\boxed{\text{1150.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)}\ y = 0:\ \ \]
\[\frac{2x + 11}{10} = 0\]
\[2x + 11 = 0\]
\[2x = - 11\]
\[x = - 5,5.\]
\[\textbf{б)}\ y = 0:\]
\[\frac{6}{8 - 0,5x} = 0\ \ \]
\[корней\ нет \Longrightarrow не\ существует\]
\[\ нулей\ функции.\]
\[\textbf{в)}\ y = 0:\]
\[\frac{3x^{2} - 12}{4} = 0\]
\[3x^{2} - 12 = 0\]
\[3x^{2} = 12\]
\[x^{2} = 4\]
\[x = \pm 2.\]