Incorrect. Notice that $\displaystyle{\left({x}+{9}\right)}{\left({x}-{9}\right)}\usepackage{cmbright}\Huge\$ is a special product: it is the product of a sum and a difference. Use the pattern $\displaystyle{\left({a}+{b}\right)}{\left({a}-{b}\right)}={{a}}^{{2}}-{{b}}^{{2}}\usepackage{cmbright}\Huge\$ to help you find the answer.