Incorrect. Factor out the 6 so that $\displaystyle{y}={6}{\left({{x}}^{{2}}-{12}{x}\right)}+{220}\usepackage{cmbright}\Huge\$ . Now complete the square by adding c to the right and 6c to the left so that $\displaystyle{y}+{6}{c}={6}{\left({{x}}^{{2}}-{12}{x}+{c}\right)}+{220}\usepackage{cmbright}\Huge\$ . What value for c makes $\displaystyle{{x}}^{{2}}-{12}{x}+{c}\usepackage{cmbright}\Huge\$ a perfect square trinomial? Make sure your final equation is in vertex form, $\displaystyle{y}={a}{{\left({x}-{h}\right)}}^{{2}}+{k}\usepackage{cmbright}\Huge\$ .