Find the Exact Solutions to the Quadratic Equation in the Complex

Multiple Choice

Find the exact solutions to the quadratic equation in the complex numbers.
- $$x ^ { 2 } + 225 = 0$$

A) $15 \mathrm { i }$
B) $\pm 15 \mathrm { i }$
C) $- 112.5 \mathrm { i }$
D) $\pm 15$