ГДЗ по алгебре и начала математического анализа 10 класс Колягин Задание 212

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\[x^{2} + 9x - 10 = 0\]

\[x_{1} + x_{2} = - 9;\ \ x_{1} \cdot x + 2 = - 10\]

\[x_{1} = - 10;\ \ x_{2} = 1.\]

\[A = \left\{ - 10;1 \right\}.\]

\[x^{2} - 3x + 2 = 0\]

\[x_{1} + x_{2} = 3;\ \ x_{1} \cdot x_{2} = 2\]

\[x_{1} = 2;\ \ \ x_{2} = 1.\]

\[B = \left\{ 1;2 \right\}.\]

\[A \cup B = \left\{ 1;2;\ - 10 \right\};\]

\[A \cap B = \left\{ 1 \right\}.\]