To solve the equation \( 36x^2 = 0 \), we can start by dividing both sides by 36:
\[ x^2 = 0 \]
Taking the square root of both sides gives:
\[ x = 0 \]
Thus, the solution set contains only the value 0. In set notation, this is expressed as:
\[ {0} \]
Therefore, the correct response is:
\({0}\)