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19-05-2023
Mathematics

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Which of the following steps is valid in reducing the augmented matrix?

2 1 4 21
3 5 0 25
1 6 2 17

O Square Row 1.
O Divide Row 2 by 2 times Row 1.
OMultiply Row 1 by Column 1.
O Add negative 3 times Row 3 to Row 2.

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