![\left[\begin{array}{ccc}0&0\\0&0\end{array}\right]](/tpl/images/0597/7138/9aa24.png)
![A=\left[\begin{array}{ccc}2&3\\-1&4\end{array}\right]](/tpl/images/0597/7138/c8df9.png)
![A^2 = A*A= \left[\begin{array}{ccc}2&3\\-1&4\end{array}\right] *\left[\begin{array}{ccc}2&3\\-1&4\end{array}\right] = \left[\begin{array}{ccc}2*2-3*1&2*3+3*4\\-1*2-4*1&-1*3+4*4\end{array}\right] =\left[\begin{array}{ccc}1&18\\-6&13\end{array}\right]](/tpl/images/0597/7138/49d04.png)
![6A=6*\left[\begin{array}{ccc}2&3\\-1&4\end{array}\right] =\left[\begin{array}{ccc}12&18\\-6&24\end{array}\right]](/tpl/images/0597/7138/a1d33.png)
![11 I = 11 * \left[\begin{array}{ccc}1&0\\0&1\end{array}\right] =\left[\begin{array}{ccc}11&0\\0&11\end{array}\right]](/tpl/images/0597/7138/2f33e.png)
![\left[\begin{array}{ccc}1&18\\-6&13\end{array}\right] -\left[\begin{array}{ccc}12&18\\-6&24\end{array}\right] +\left[\begin{array}{ccc}11&0\\0&11\end{array}\right] =\left[\begin{array}{ccc}0&0\\0&0\end{array}\right]](/tpl/images/0597/7138/e0d6f.png)
A=(2 3)
(-1 4)
Calculate A^2-6A+11I...
Answers: 3
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