Three polynomials are factored below, but some coefficients and constants are missing. All of the missing values of a, b, c, and d are integers.

1. $\displaystyle{{x}}^{{2}}-{2}{x}-{15}={\left({a}{x}+{b}\right)}{\left({c}{x}+{d}\right)}\usepackage{cmbright}\Huge\$

2. $\displaystyle{2}{{x}}^{{3}}-{6}{{x}}^{{2}}-{36}{x}={2}{x}{\left({a}{x}+{b}\right)}{\left({c}{x}+{d}\right)}\usepackage{cmbright}\Huge\$

3. $\displaystyle{4}{{x}}^{{2}}+{10}{x}+{4}={\left({a}{x}+{b}\right)}{\left({c}{x}+{d}\right)}\usepackage{cmbright}\Huge\$

Fill in the table with the missing values of a, b, c, and d.