![\left[\begin{array}{ccc}-6&10\\10&-10\end{array}\right]](/tpl/images/2667/9178/43841.png)
![-2A=-2*\left[\begin{array}{ccc}3&-5\\-5&5\end{array}\right]=\left[\begin{array}{ccc}-6&10\\10&-10\end{array}\right]](/tpl/images/2667/9178/36ec4.png)
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Answers: 1
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