Standard form of a quadratic equation is $\displaystyle{a}{{x}}^{{2}}+{b}{x}+{c}={0}\usepackage{cmbright}\Huge\$ .

Rewrite so that the right side is 0: $\displaystyle-{7}{x}+{3}{{x}}^{{2}}-{6}={0}\usepackage{cmbright}\Huge\$

Reorder the terms: $\displaystyle{3}{{x}}^{{2}}-{7}{x}-{6}={0}\usepackage{cmbright}\Huge\$