You found the correct GCF, but when you tried to factor it out, you mistakenly wrote $\displaystyle{{x}}^{{2}}+{33}{x}+{90}\usepackage{cmbright}\Huge\$ as the second factor, when it should be $\displaystyle{{x}}^{{2}}+{11}{x}+{30}\usepackage{cmbright}\Huge\$ .