\[f(x) = 4x² - 5x + 1\]
\[4x^{2} - 5x + 1 = 0\]
\[D = 25 - 16 = 9\]
\[x_{1} = \frac{5 + 3}{8} = 1\]
\[x_{2} = \frac{5 - 3}{8} = \frac{1}{4}\]
\[Ответ:1;\frac{1}{4}.\]