Solve the Equation in the Real Number System $2 x ^ { 4 } - 15 x ^ { 3 } + 60 x ^ { 2 } - 115 x + 78 = 0$

Multiple Choice

Solve the equation in the real number system.
- $2 x ^ { 4 } - 15 x ^ { 3 } + 60 x ^ { 2 } - 115 x + 78 = 0$

A) $\left\{ - 2 , \frac { 3 } { 2 } \right\}$
B) $\left\{ 2 , - \frac { 3 } { 2 } \right\}$
C) $\left\{ 2 , \frac { 3 } { 2 } \right\}$
D) $\left\{ - 2 , - \frac { 3 } { 2 } \right\}$