To solve the equation \( x^2 = \frac{36}{169} \), we take the square root of both sides.
This gives us:
\[ x = \pm \sqrt{\frac{36}{169}} \]
Calculating the square root of the fraction:
\[ \sqrt{\frac{36}{169}} = \frac{\sqrt{36}}{\sqrt{169}} = \frac{6}{13} \]
Thus, the solutions are:
\[ x = \frac{6}{13} \quad \text{and} \quad x = -\frac{6}{13} \]
So, the correct solution set is:
\[ \left{ -\frac{6}{13}, \frac{6}{13} \right} \]
The correct choice from the responses is:
\({−\frac{6}{13}, \frac{6}{13}}\)