Correct. There are only two $\displaystyle{{c}}^{{2}}{b}\usepackage{cmbright}\Huge\$ terms in these polynomials: $\displaystyle-{8}{{c}}^{{2}}{b}+{10}{{c}}^{{2}}{b}={\left(-{8}+{10}\right)}{{c}}^{{2}}{b}={2}{{c}}^{{2}}{b}\usepackage{cmbright}\Huge\$

So 2 is the coefficient.