\[x² - 4xy + 5y^{2} + 2y + 2 > 0\]
\[(x - 2y)^{2} + (y + 1)^{2} + 1 > 0\]
\[(x - 2y)^{2} \geq 0;\ \ (y + 1)^{2} \geq 0;\ \ \]
\[1 > 0 \Longrightarrow верно.\]