Decide Whether or Not the Matrices Are Inverses of Each $\left[ \begin{array} { r r } - 2 & 4 \\ 4 & - 4 \end{array} \right]$

Multiple Choice

Decide whether or not the matrices are inverses of each other.
- $\left[ \begin{array} { r r } - 2 & 4 \\ 4 & - 4 \end{array} \right]$ and $\left[ \begin{array} { l l } \frac { 1 } { 2 } & \frac { 1 } { 4 } \\ \frac { 1 } { 2 } & \frac { 1 } { 4 } \end{array} \right]$

A) Yes
B) $\mathrm { No }$