\[16x^{2} - 40x + 25 = 0\]
\[(4x - 5)^{2} = 0\]
\[4x - 5 = 0\]
\[4x = 5\]
\[x = \frac{5}{4} = 1\frac{1}{4}\]
\[x = 1,25.\]