\[x² - 6x + 4 = 0\]
\[D = b^{2} - 4ac = 36 - 4 \cdot 1 \cdot 4 =\]
\[= 36 - 16 = 20\]
\[x_{1} = \frac{6 + 2\sqrt{5}}{2} = 3 + \sqrt{5} \approx 5,236\]
\[x_{2} = \frac{6 - 2\sqrt{5}}{2} = 3 - \sqrt{5} \approx 0,764\]
\[Ответ:x = 5,236\ \ и\ \ \ x = 0,764.\]