Solve $2 x ^ { 2 } - 9 = 0$

Multiple Choice

Solve $2 x ^ { 2 } - 9 = 0$ by the square root property.

A) $\left\{ \frac { 9 } { 2 } \right\}$
B) $\{ \pm 3 \}$
C) $\left\{ \pm \frac { 3 \sqrt { 2 } } { 2 } \right\}$
D) $\{ - 3 \}$