If $\bigg(\large\frac{1}{x}+x \bigg)^2$$=36$, what is the value of $\large\frac{1}{x^2}+x^2$ ?

Question

$\begin{array}{1 1} (a)\;90 \\ (b)\;30 \\(c)\;34\\(d)\;60 \end{array}$