ГДЗ по алгебре 8 класс Макарычев ФГОС Задание 1068

\[\boxed{\text{1068.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]

\[\textbf{а)}\ g(x) = x \cdot (x + 4)\]

\[x(x + 4) = 0\]

\[x_{1} = 0\ \ \ \ и\ \ \ \ \ x_{2} + 4 = 0\]

\[\text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }x_{2} = - 4\]

\[Ответ:x = 0;x = - 4.\]

\[\textbf{б)}\ g(x) = \frac{x + 1}{5 - x}\ \]

\[\frac{x + 1}{5 - x} = 0\]

\[x + 1 = 0\ \ \ \ \ \ \ \ \ \ \ \ 5 - x \neq 0\]

\[x = - 1\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x \neq 5\]

\[Ответ:x = - 1.\]