Use the Quadratic Formula to Solve the Equation $$( x + 8 ) ( x - 1 ) = 9$$

Multiple Choice

Use the quadratic formula to solve the equation.
- $$( x + 8 ) ( x - 1 ) = 9$$

A) $\left\{ \frac { - 7 - 3 \sqrt { 13 } } { 2 } , \frac { - 7 + 3 \sqrt { 13 } } { 2 } \right\}$
B) $\left\{ \frac { - 7 - 3 i \sqrt { 13 } } { 2 } , \frac { - 7 + 3 i \sqrt { 13 } } { 2 } \right\}$
C) $\left\{ \frac { 7 - 3 i \sqrt { 13 } } { 2 } , \frac { 7 + 3 i \sqrt { 13 } } { 2 } \right\}$
D) $\left\{ \frac { 7 - 3 \sqrt { 13 } } { 2 } , \frac { 7 + 3 \sqrt { 13 } } { 2 } \right\}$