Incorrect. First, express $\displaystyle{{x}}^{{2}}-{5}{x}+{4}\usepackage{cmbright}\Huge\$ as $\displaystyle{{x}}^{{2}}+{r}{x}+{s}{x}+{4}\usepackage{cmbright}\Huge\$ so that $\displaystyle{r}+{s}=-{5}\usepackage{cmbright}\Huge\$ and $\displaystyle{r}{s}={4}\usepackage{cmbright}\Huge\$ . Then use the distributive property to complete the factorization.