\[\boxed{\text{578\ (578).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ \frac{x(x - 3)}{6} - \frac{x}{2} = 0\ \ \ \ \ \ | \cdot 6\] \[x(x - 3) - 3x = 0\] \[x^{2} - 3x - 3x = 0\] \[x^{2} - 6x = 0\] \[x(x - 6) = 0\] \[x = 0,\ \ x = 6\] \[Ответ:x = 0;\ \ x = 6.\] |
\[\textbf{б)}\ \frac{\text{\ x}(x + 1)}{3} + \frac{8 + x}{4} = 2\ \ \ \ \ \ | \cdot 12\] \[4x(x + 1) + 3(8 + x) = 24\] \[4x^{2} + 4x + 24 + 3x = 24\] \[4x^{2} + 7x = 0\] \[x(4x + 7) = 0\] \[x = 0\ \ \ \ \ \ 4x + 7 = 0\] \[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 4x = - 7\] \[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = - \frac{7}{4}\] \[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = - 1,75\ \] \[Ответ:x = 0;\ \ x = - 1,75.\] |
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\[\boxed{\text{578.}\text{\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
Пояснение.
Решение.