## xartaan 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?: $\left[\begin{matrix}5 & 0 & 0 \\ 0 & 5 & 0 \\ 0 & 0 & 5\end{matrix}\right]$ one year ago one year ago

1. xartaan

$\left[\begin{matrix}0 & -1 & 3 \\ -4 & -2 & -6 \\ -3 & 1 & -3\end{matrix}\right]$ should be my solution right?

2. KingGeorge

Looks good to me.

3. xartaan

Great, thanks!

4. KingGeorge

You're welcome.