= ![\left[\begin{array}{cc}12&7\\17&-51\end{array}\right]](/tpl/images/0954/3539/7af54.png)
![\left[\begin{array}{cc}12&-13\\17&-22\end{array}\right]](/tpl/images/0954/3539/58b0d.png)
= ![\left[\begin{array}{cc}7&-13\\-51&-22\end{array}\right]](/tpl/images/0954/3539/93736.png)
Can someone help pls !
...
Answers: 3
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