Question: Check if the matrices A = (1, 1, 1; 2, 3, 2; 3, 9, 4) B = (4, 0, -1; -1, 4, -1; 3, 3,

Check if the matrices


A = (1, 1, 1; 2, 3, 2; 3, 9, 4)


B = (4, 0, -1; -1, 4, -1; 3, 3, -1)


are invertible. If they are, find the inverse matrices using elementary row operations

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