Incorrect. Remember that $\displaystyle{{3}}^{{x}}{{3}}^{{y}}={{3}}^{{{x}+{y}}}\usepackage{cmbright}\Huge\$ and $\displaystyle{{\left({{3}}^{{a}}\right)}}^{{b}}={{3}}^{{{a}{b}}}\usepackage{cmbright}\Huge\$ . It's also useful to note that $\displaystyle{{3}}^{{2}}={9}\usepackage{cmbright}\Huge\$ and $\displaystyle{{3}}^{{3}}={27}\usepackage{cmbright}\Huge\$ . Use these rules of exponents to simplify this expression.