• anonymous
Given a matrix A such that $A = \left[\begin{matrix}5 & -1 & 3 \\ -4 & 3 & -6 \\ -3 & 1 & 2\end{matrix}\right]$ I am asked to compute:$A-5I_3$ Now, since I_3 is the identity matrix, it looks like this right?: $\left[\begin{matrix}5 & 0 & 0 \\ 0 & 5 & 0 \\ 0 & 0 & 5\end{matrix}\right]$
Mathematics

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