If $A=\left[\begin{array}{ccc}1 & 0 & 0 \ 2 & 1 & 0 \ -3 & 2 & 1\end{array} ight]$ and $B=\left[\begin{array}{ccc}1 & 0 & 0 \ -2 & 1 & 0 \ 7 & -2 & 1\end{array} ight]$ then $A B$ equals

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If $A=\left[\begin{array}{ccc}1 & 0 & 0 \ 2 & 1 & 0 \ -3 & 2 & 1\end{array}ight]$ and $B=\left[\begin{array}{ccc}1 & 0 & 0 \ -2 & 1 & 0 \ 7 & -2 & 1\end{array}ight]$ then $A B$ equals

Aicharya · Accepted Answer

$ \begin{aligned} & A=\left[\begin{array}{ccc} 1 & 0 & 0 \ 2 & 1 & 0 \ -3 & 2 & 1 \end{array}ight], B=\left[\begin{array}{ccc} 1 & 0 & 0 \ -2 & 1 & 0 \ 7 & -2 & 1 \end{array}ight] \ & A B=\left[\begin{array}{lll} 1 & 0 & 0 \ 0 & 1 & 0 \ 0 & 0 & 1 \end{array}ight]=I \end{aligned} $

If $A=\left[\begin{array}{ccc}1 & 0 & 0 \\ 2 & 1 & 0 \\ -3 & 2 & 1\end{array}\right]$ and…

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