Decide Whether the Matrices Are Inverses of Each Other $\left[\begin{array}{ll}-5 & 1 \\ -7 & 1\end{array}\right]$

True/False

Decide whether the matrices are inverses of each other. (Check to see if their product is the identity matrix I.)
- $\left[\begin{array}{ll}-5 & 1 \\ -7 & 1\end{array}\right]$ and $\left[\begin{array}{cc}\frac{1}{2} & -\frac{1}{2} \\ \frac{7}{2} & -\frac{5}{2}\end{array}\right]$