\[\frac{y^{2} - 7y + 5}{5}\text{\ \ \ \ \ }\]
\[при\ \ \ y = 1,5:\]
\[\frac{(1,5)^{2} - 7 \cdot 1,5 + 5}{5} =\]
\[= \frac{2,25 - 10,5 + 5}{5} = \frac{- 3,25}{5} =\]
\[= - 0,65.\]