Solve the Equation by Completing the Square $30 \mathrm {~d} ^ { 2 } + 61 \mathrm {~d} + 30 = 0$

Multiple Choice

Solve the equation by completing the square.
- $30 \mathrm {~d} ^ { 2 } + 61 \mathrm {~d} + 30 = 0$

A) $- \frac { 6 } { 5 } , - \frac { 6 } { 5 }$
B) $\frac { 5 } { 6 } , \frac { 6 } { 5 }$
C) $- \frac { 5 } { 6 } , - \frac { 6 } { 5 }$
D) $\frac { 6 } { 5 } , \frac { 5 } { 6 }$