Matrices And Determinants

Let $A=\left[\begin{array}{ll}x & 1 \\ 1 & 0\end{array}\right], x \in \mathbb{R}^{+}$and $A^4=\left[a_{i j}\right]_2$.
If $a_{11}=109$, then $\left(A^4\right)^{-1}=$