\[2x^{2} - 9x + 10 = 0\]
\[D = 81 - 80 = 1\]
\[x_{1} = \frac{9 + 1}{4} = \frac{10}{4} = 2,5;\]
\[x_{2} = \frac{9 - 1}{4} = 2.\]
\[Ответ:x = 2,5;x = 2.\]