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

question 21

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) \(\left\{ \frac { 7 - 3 \sqrt { 13 } } { 2 } , \frac { 7 + 3 \sqrt { 13 } } { 2 } \right\}\)

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