Question
Evaluate$: \left[\begin{array}{lll}2 & -1 & 3\end{array}\right]\left[\begin{array}{l}4 \\ 3 \\ 1\end{array}\right]$
✓
Answer
$\left[\begin{array}{lll}2 & -1 & 3\end{array}\right]\left[\begin{array}{l}4 \\ 3 \\ 1\end{array}\right]$
$= [2(4)-1(3)+ 3(1)] $
$= [8 – 3 + 3] $
$= [8]$
$= [2(4)-1(3)+ 3(1)] $
$= [8 – 3 + 3] $
$= [8]$
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