ГДЗ по алгебре 7 класс Макарычев Задание 523

\[\boxed{\text{523\ (523).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[\textbf{а)}\ если\ \ x = 1,5:\]

\[x^{2} = {1,5}^{2} = 2,25;\ \ \ \]

\[- x^{2} = - {1,5}^{2} = - 2,25;\ \ \]

\[( - x)^{2} = ( - 1,5)^{2} = 2,25.\]

\[если\ \ x = - 2:\]

\[\ x^{2} = ( - 2)^{2} = 4;\ \ \ \]

\[- x^{2} = - {( - 2)}^{2} = - 4;\ \ \]

\[( - x)^{2} = \left( - ( - 2) \right)^{2} = 4.\]

\[\textbf{б)}\ если\ \ x = 1,5:\]

\[x^{3} = {1,5}^{3} = 2,25 \cdot 1,5 = 3,375;\ \ \ \]

\[- x^{3} = - {1,5}^{3} = - 3,375;\ \ \]

\[( - x)^{3} = ( - 1,5)^{3} = - 3,375.\]

\[если\ \ x = - 2:\]

\[x^{3} = ( - 2)^{3} = - 8;\ \ \ \]

\[- x^{3} = - {( - 2)}^{3} = 8;\ \ \]

\[( - x)^{3} = \left( - ( - 2) \right)^{3} = 8.\]