\[\boxed{\text{1034\ (1034).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ y = \frac{x^{2} - 4}{x - 2} = \frac{(x - 2)(x + 2)}{x - 2} =\]
\[= x + 2;\ \ \ \ x \neq 2\]
\[\textbf{б)}\ y = \frac{x^{2} - 2x}{x} = \frac{x(x - 2)}{x} =\]
\[= x - 2;\ \ \ \ x \neq 0\]
\[\textbf{в)}\ y = \frac{x^{2} - 3x + 2}{2 - x} =\]
\[= \frac{(x - 1)(x - 2)}{2 - x} = 1 - x;\ \ \ \ \]
\[x \neq 2\]
\[x^{2} - 3x - 2 = (x - 1)(x - 2)\]
\[x_{1} + x_{2} = 3;\ \ \ \ x_{1} \cdot x_{2} = 2\]
\[x_{1} = 1;\ \ \ \ \ \ x_{2} = 2.\]