Given \( A = \begin{pmatrix} 1 & -2 & 3 \\ 4 & 5 & -6 \end{pmatrix} \) and \( B = \begin{pmatrix} 3 & 0 & 2 \\ -7 & 1 & 8 \end{pmatrix} \), find:
(a) \( A+B \), (b) \( 2A-3B \).
matrix-additionscalar-multiplicationlinear-combinationmatriceslinear-algebraevaluate-expressionarithmeticmatrix-operations
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