Solve For $x$ Assume That $a$ And $b$ Represent Positive Real Numbers $\mathrm{x}^{2}-\mathrm{a}^{2}-25=0$

Multiple Choice

Solve for $x$ . Assume that $a$ and $b$ represent positive real numbers.
- $\mathrm{x}^{2}-\mathrm{a}^{2}-25=0$

A) $\left\{\sqrt{a^{2}+25},-\sqrt{a^{2}-25}\right\}$

B) $\left\{\sqrt{a^{2}+25},-\sqrt{a^{2}+25}\right\}$

C) $\left\{a^{2}+25, a^{2}-25\right\}$

D) $\left\{\sqrt{a^{2}+5},-\sqrt{a^{2}-5}\right\}$