ГДЗ по алгебре 8 класс Макарычев Задание 368

\[\boxed{\text{368\ (368).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[\textbf{а)}\ x^{2} = 11\]

\[x = \pm \sqrt{11}.\]

\[\sqrt{x} = 11\]

\[\left( \sqrt{x} \right)^{2} = 11^{2}\ \]

\[x = 121.\]

\[\textbf{б)}\ 2x^{2} = \frac{1}{2}\]

\[x^{2} = \frac{1}{2}\ :2 = \frac{1}{4}\]

\[x = \pm \sqrt{\frac{1}{4}}\]

\[x = \pm \frac{1}{2}.\]

\[2 \cdot \sqrt{x} = \frac{1}{2}\]

\[\sqrt{x} = \frac{1}{2}\ :2 = \frac{1}{4}\]

\[\left( \sqrt{x} \right)^{2} = \left( \frac{1}{4} \right)^{2}\]

\[x = \frac{1}{16}.\]