The first matrix.
What is a matrix?
A matrix is an array of numbers arranged in rows and columns.
Analysis:
1/2R2 +R3 to R3
means divide row 2 by 2 and add it to row 3 to form row 3 of the new matrix.
1/2R2 = -1 -3 3 -2
R3 = 0 3 -2 -9
1/2R2 + R3 = -1 0 1 -11
In conclusion, the matrix with the above operation is the first matrix.
Learn more about matrix: brainly.com/question/1821869
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