Use either elementary row or column operations, or cofactor expansion, to find the determinant by hand. Then use a software program or a graphing utility to verify your answe 5 9 1 0 4 0 5 4 2 STEP 1: Expand by cofactors along the second row. 5 9 1 4 0 = 4 5 4 2 STEP 2: Find the determinant of the 2x2 matrix found in Step 1. STEP 3: Find the determinant of the original matrix.

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