Incorrect. First correctly interpret the notation. For example, $\displaystyle{\left({f{\cdot}}{g}\right)}{\left({x}\right)}={f{{\left({x}\right)}}}\cdot{g{{\left({x}\right)}}}={\left({4}{x}-{9}\right)}{\left({4}{x}+{9}\right)}\usepackage{cmbright}\Huge\$ . Use the distributive property and add like terms.