Question

x^2 - 10x - 9 = 0

Answer 1

\[\huge x_1=\frac{10-\sqrt{100+36}}{2}\rightarrow 5-\frac{\sqrt{136}}{2}\]
\[\huge x_2=\frac{10+\sqrt{100+36}}{2}\rightarrow 5+\frac{\sqrt{136}}{2}\]