\[\boxed{\text{429\ (429).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ x \cdot (x - 1) = 0\]
\[\left\{ \begin{matrix} x = 0 \\ x = 1 \\ \end{matrix} \right.\ \]
\[Ответ:\left\{ 0;1 \right\}.\]
\[2)\ (x - 2) \cdot \left( x^{2} - 4 \right) = 0\]
\[(x - 2) \cdot (x - 2) \cdot (x + 2) = 0\]
\[\left\{ \begin{matrix} x = 2\ \ \ \\ x = - 2 \\ \end{matrix} \right.\ \]
\[Ответ:\left\{ - 2;2 \right\}.\]
\[3)\ x = 2\]
\[Ответ:\left\{ 2 \right\}.\]
\[4)\ x^{2} + 3 = 0\]
\[x^{2} = - 3\]
\[корней\ нет.\]
\[Ответ:\{\varnothing\}.\ \]