Incorrect. Substitute $\displaystyle{a}={1},{b}={2}\usepackage{cmbright}\Huge\$ , and $\displaystyle{c}={50}\usepackage{cmbright}\Huge\$ into the Quadratic Formula:

$\displaystyle{x}=\frac{{-{b}\pm\sqrt{{{{b}}^{{2}}-{4}{a}{c}}}}}{{{2}{a}}}\usepackage{cmbright}\Huge\$

The correct answer is 7.