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I don't think I did part (b) right, i just applied theoperations I used in part a to part (b). If an expert could pleasereview my solution it would be greatly appriciated.
If C= matrix 3x3 [2, -1,12; 3, 6, -9; 1, 1, 3] and D= matrix 3x3 [9, 5, -21; -6, -2, 18; -1, -1, 5], are C and D inverse matrices? Use the adjoining method and Gauss-Jordan elimination. You may use a calculator.
