Perform the Matrix Multiplication $A = \left[ \begin{array} { l } - 2 \\ 1 \\ - 1 \end{array} \right]$

question 122

Essay

Perform the matrix multiplication.
-Let $A = \left[ \begin{array} { l } - 2 \\ 1 \\ - 1 \end{array} \right]$ and $B = \left[ \begin{array} { l l l } 1 & - 1 & 0 \end{array} \right]$
Find $\mathrm { AB } .$

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