Solve for a.

$\displaystyle{{a}}^{{2}}-{7}{a}+{10}={0}\usepackage{cmbright}\Huge\$

Enter the roots of the equation below, and use a comma to separate the terms. For example, to enter $\displaystyle{a}={0}\usepackage{cmbright}\Huge\$ or $\displaystyle{a}=-{3}\usepackage{cmbright}\Huge\$ , enter 0,-3.