Let \( A=\left[\begin{array}{lll}1 & 1 & 1 \\ 3 & 3 & 3\end{array}\...

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Let \( A=\left[\begin{array}{lll}1 & 1 & 1 \\ 3 & 3 & 3\end{array}\right], B=\left[\begin{array}{rr}3 & 1 \\ 5 & 2 \\ -2 & 4\end{array}\right] \) and \( C=\left[\begin{array}{rr}4 & 2 \\ -3 & 5 \\ 5 & 0\end{array}\right] \).
- Verify that \( A B=A C \) though \( B \neq C, A \neq O \).
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