\[\frac{2y² + 5y + 2}{y² - 4} = 1\]
\[ОДЗ:\ \ y \neq \pm 2\]
\[\frac{2y² + 5y + 2 - y^{2} + 4}{y² - 4} = 0\]
\[\frac{y^{2} + 5y + 6}{y^{2} - 4} = 0\]
\[y^{2} + 5y + 6 = 0\]
\[D = b^{2} - 4ac = 25 - 4 \cdot 1 \cdot 6 =\]
\[= 1\]
\[y_{1} = \frac{- 5 + 1}{2} = - \frac{4}{2} =\]
\[= - 2\ \ (не\ подходит\ по\ ОДЗ)\]
\[y_{2} = \frac{- 5 - 1}{2} = - \frac{6}{2} = - 3\]
\[Ответ:\ \ y = - 3.\]