Question

(5 4) (7 4)
(2 1) (0 2)​

Answer 1

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$\begin{pmatrix}\sf5&\sf4\\\sf2&\sf1\end{pmatrix}\cdot\begin{pmatrix}\sf7&\sf4\\\sf0&\sf2\end{pmatrix}=\begin{pmatrix}\sf5\cdot7+4\cdot0&\sf5\cdot4+4\cdot2\\\sf2\cdot7+1\cdot0 &\sf2\cdot4+1\cdot2\end{pmatrix}\\\large\boxed{\begin{array}{l}\begin{pmatrix}\sf5&\sf4\\\sf2&\sf1\end{pmatrix}\cdot\begin{pmatrix}\sf7&\sf4\\\sf0&\sf2\end{pmatrix}=\begin{pmatrix}\sf35&\sf28\\\sf14&\sf10\end{pmatrix}\end{array}}\blue{\checkmark}$