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Matrices — Mathematics STD 10 — Question

ICSE BoardEnglish MediumSTD 10MathematicsMatrices1 Mark
Question
Evaluate if possible $\left[\begin{array}{cc}6 & 4 \\ 3 & -1\end{array}\right]\left[\begin{array}{c}-1 \\ 3\end{array}\right]$
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Answer

$\left[\begin{array}{cc}6 & 4 \\ 3 & -1\end{array}\right]\left[\begin{array}{c}-1 \\ 3\end{array}\right]=\left[\begin{array}{c}-6+12 \\ -3-3\end{array}\right]=\left[\begin{array}{c}6 \\ -6\end{array}\right]$

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