$A=\left[\begin{array}{rr} -5 & -9
\\ 8 & 7 \end{array}\right] $ and
$B=\left[\begin{array}{rr} \dfrac{2}{37} & \dfrac{9}{37}
\\\\-\dfrac{8}{37} & -\dfrac{4}{37} \end{array}\right]$
**Are $A$ and $B$ inverses?**
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