Use the Quadratic Formula to Solve the Equation $7 x^{2}+3 x+6=0$

Multiple Choice

Use the quadratic formula to solve the equation.
- $7 x^{2}+3 x+6=0$

A) $\left\{\frac{-3+i \sqrt{159}}{14}, \frac{-3-i \sqrt{159}}{14}\right\}$

B) $\left\{\frac{3+\mathrm{i} \sqrt{159}}{14}, \frac{3-\mathrm{i} \sqrt{159}}{14}\right\}$

C) $\left\{\frac{-3+\mathrm{i} \sqrt{159}}{7}, \frac{-3-\mathrm{i} \sqrt{159}}{7}\right\}$

D) $\left\{\frac{3+\mathrm{i} \sqrt{159}}{7}, \frac{3-\mathrm{i} \sqrt{159}}{7}\right\}$