EM-2113

Scalar multiplication of matrices

E Math · Secondary 4 · Medium · Scalar multiplication of matrices

A matrix

A

is given by

A = \begin{pmatrix}2 & 5\\3 & 4\end{pmatrix}

. Find the matrix

3A

.

$\begin{pmatrix}6 & 15\\9 & 12\end{pmatrix}$
$\begin{pmatrix}5 & 8\\7 & 7\end{pmatrix}$
$\begin{pmatrix}6 & 10\\9 & 8\end{pmatrix}$
$\begin{pmatrix}2 & 15\\3 & 12\end{pmatrix}$

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