\[\boxed{\mathbf{1.}}\]
\[Произведение\ корней:\ \]
\[- 6 \cdot 1,5 = - 9.\]
\[Ответ:\ - 9.\]
\[\boxed{\mathbf{2.}}\]
\[1)\ 0 \cdot x = 0\]
\[x - любое.\]
\[2)\ x - 2 = 5 + x\]
\[x - x = 5 + 2\]
\[0 \neq 7\]
\[нет\ решения.\]
\[3)\ x^{2} = x\]
\[x = 0;\ \ x = 1.\]
\[4)\ |x| + 2 = 1\]
\[|x| = - 1\]
\[нет\ решения.\]
\[Ответ:2)\ и\ 4).\]
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