ANSWER
[tex](x+6)(x-6)[/tex]EXPLANATION
We want to factor the expression given:
[tex]x^2-36[/tex]To do this, we use the difference of two squares method:
[tex]a^2-b^2=(a+b)(a-b)[/tex]Therefore, we have:
[tex]\begin{gathered} x^2-36 \\ x^2-6^2 \\ \Rightarrow(x+6)(x-6) \end{gathered}[/tex]That is the answer.