6 Determine the Most Efficient Method to Use When Solving $\mathrm { y } = \mathrm { x } ^ { 2 } + 12 \mathrm { x }$

Multiple Choice

6 Determine the Most Efficient Method to Use When Solving a Quadratic Equation
- $\mathrm { y } = \mathrm { x } ^ { 2 } + 12 \mathrm { x }$ and $\mathrm { y } = - 16$

A) $- 6 \pm 2 \sqrt { 5 }$
B) $- 6 \pm 2 \sqrt { 10 }$
C) $\pm 2 \sqrt { 5 }$
D) $2 \sqrt { 5 } \pm 6$