MathAlgebraLinear algebraMatrices

Matrix multiplication

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$L = \begin{pmatrix} 1 & a \\ 2& 3 \end{pmatrix}$ , $G = \begin{pmatrix} 1 & 1 \\ 1 & 2 \end{pmatrix}$ , find a if $L\cdot G = G\cdot L$ .

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