Match each expression on the left to the equivalent difference on the right, for the following functions.

$\displaystyle{f{{\left({x}\right)}}}={8}{{x}}^{{2}}-{3}{x}-{4}\usepackage{cmbright}\Huge\$

$\displaystyle{g{{\left({x}\right)}}}=-{8}{{x}}^{{2}}+{9}{x}-{5}\usepackage{cmbright}\Huge\$

Some answer choices on the right will not be used.