Incorrect. You need to find the greatest common factor of $\displaystyle{2}{{x}}^{{3}}\usepackage{cmbright}\Huge\$ , $\displaystyle{8}{{x}}^{{2}}\usepackage{cmbright}\Huge\$ , and $\displaystyle{64}{x}\usepackage{cmbright}\Huge\$ . So you have to find the GCF of 2, 8, and 64, as well as the variables they have in common.