If $A=\left(\begin{array}{ccc}3 & 4 & -1 \ -5 & 1 & 7 \ 2 & 3 & 1\end{array}\right)$ and $B=\left(\begin{array}{ccc}-2 & 3 & 9 \ 0 & -4 & -2 \ 5 & 6 & 3\end{array}\right)$, calculate $2 A-B$.

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The Answer of If $A=\left(\begin{array}{ccc}3 & 4 & -1 \ -5 & 1 & 7 \ 2 & 3 & 1\end{array}\right)$ and $B=\left(\begin{array}{ccc}-2 & 3 & 9 \ 0 & -4 & -2 \ 5 & 6 & 3\end{array}\right)$, calculate $2 A-B$.

If A=(34−1−517231)A=\left(\begin{array}{ccc}3 & 4 & -1 \\ -5 & 1 & 7 \\ 2 & 3 & 1\end{array}\right)A=​3−52​413​−171​​

If $A=\left(\begin{array}{ccc}3 & 4 & -1 \\ -5 & 1 & 7 \\ 2 & 3 & 1\end{array}\right)$