Solve the Equation by Making an Appropriate Substitution $$( 3 x - 6 ) ^ { 2 } + 9 ( 3 x - 6 ) + 20 = 0$$

Multiple Choice

Solve the equation by making an appropriate substitution.
- $$( 3 x - 6 ) ^ { 2 } + 9 ( 3 x - 6 ) + 20 = 0$$

A) $\left\{ - \frac { 10 } { 6 } , \frac { 11 } { 3 } \right\}$
B) $\left\{ - \frac { 2 } { 3 } , - \frac { 1 } { 3 } \right\}$
C) $\left\{ \frac { 2 } { 3 } , \frac { 1 } { 3 } \right\}$
D) $\left\{ \frac { 10 } { 3 } , - \frac { 11 } { 3 } \right\}$