Question: A = [1, -2, 4 | 1 ] 4, -7, 3 | -1 -4, 5 , 5 | -1 Given the augmented matrix perform each

A = [1, -2, 4 | 1 ]

4, -7, 3 | -1

-4, 5 , 5 | -1

Given the augmented matrix perform each row operation in the order specified and enter the final result.

first: R2 - 4R1 -> R2

second: R3 + 4R1 -> R3

third: R3 + 3R2 -> R3

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