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Matrix Algebra and Applications - UTEP

Scalar Multiplication A matrix A can be added to itself because the expression A + A is the sum of two ma- trices that have the same dimensions. When we compute A + A, we end up doubling every entry in A.So we can think of the expression 2A as telling us to multiply every element in A by 2. In general, to multiply a matrix by a number, multiply every entry in the matrix by