Question: An elementary matrix E is one that performs a single elementary row operation on a matrix A when multiplied on the left of the matrix.

An elementary matrix E is one that performs a single elementary row operation on a matrix A when multiplied on the left of the matrix. That is, EA is the result of an elementary row operation on A. 1 4 7 Let A = 2 5 8 3 6 Find the elementary matrix E3 that replaces row 3 with 5 times row 2 added to row 3 (That is, 5R2 + R3 -> R3 R3)

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