For the following pair of matrix verify that [\left( AB \right)^{- 1} = B^{- 1} A^{- 1} :]

[A = \begin{bmatrix}3 & 2 \ 7 & 5\end{bmatrix}\text{ and }B \begin{bmatrix}4 & 6 \ 3 & 2\end{bmatrix}]