Question 22351
First multiply the factors:
{{{(x+2)(x+3) = x^2 + 5x + 6}}} so,
{{{x^2 + 5x + 6 = 20}}} Subtract 20 from both sides.
{{{x^2 + 5x - 14 = 0}}} Solve by factoring.
{{{(x - 2)(x + 7) = 0}}} Apply the zero product principle.
{{{(x - 2) = 0}}} and/or {{{(x + 7) = 0}}}
If {{{x - 2 = 0}}} then, {{{x = 2}}}
If {{{x + 7 = 0}}} then, {{{x = -7}}}

The roots are:
x = 2
x = -7