Correct. $\displaystyle{\left({4}{y}-{7}\right)}{\left({4}{y}+{7}\right)}\usepackage{cmbright}\Huge\$ results in $\displaystyle{16}{{y}}^{{2}}+{28}{y}-{28}{y}-{49}\usepackage{cmbright}\Huge\$ . The two middle terms cancel, resulting in a two-term polynomial. This expression is an example of a special product of polynomials: the product of a sum and a difference. It has the general form $\displaystyle{\left({a}+{b}\right)}{\left({a}-{b}\right)}={{a}}^{{2}}-{{b}}^{{2}}\usepackage{cmbright}\Huge\$ .