Решебник по алгебре 8 класс Макарычев ФГОС Задание 310

 

\[\boxed{\text{310\ (310).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[Пусть\ искомое\ число\ равно\ \text{a.}\]

\[1)\ \sqrt{a} = 0\]

\[a = 0^{2}\]

\[a = 0.\]

\[2)\ \sqrt{a} = 1\]

\[a = 1^{2}\]

\[a = 1.\]

\[3)\ \sqrt{a} = 3\]

\[a = 3^{2}\]

\[a = 9.\]

\[4)\ \sqrt{a} = 10\]

\[a = 10^{2}\]

\[a = 100.\]

\[5)\ \sqrt{a} = 0,6\]

\[a = {0,6}^{2}\]

\[a = 0,36.\]

\[\boxed{\text{310.}\text{\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]

Пояснение.

Решение.

\[\textbf{а)}\ |x| = ?\]

\[|10| = 10;\]

\[|0,3| = 0,3;\]

\[|0| = 0;\]

\[| - 9| = 9;\]

\[| - 2,7| = 2,7;\]

\[\textbf{б)}\ x = ?\]

\[|x| = 6\]

\[x = \pm 6.\]

\[|x| = 3,2\]

\[x = \pm 3,2.\]

\[|x| = 0\]

\[x = 0.\]