Solve by Extracting Square Roots
- $x^{2}+343=0$ A) $\{ \pm 14 \sqrt{7} i\}$

Multiple Choice

Solve by extracting square roots
- $x^{2}+343=0$

A) $\{ \pm 14 \sqrt{7} i\}$
B) $\{ \pm 7 \sqrt{7}\}$
C) $\{ \pm 7 \sqrt{7} i\}$
D) $\{ \pm \sqrt{7} i\}$