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9. [-5 Points] DETAILS LARLINALGE 13.001535. Use the fact that ICAI = 4:"|A| to evaluate the determinant of the n x n matrix. A= B 4 1'5 12 STEP 1: Factor out the greatest common divisor. B 4 = :l i:i i:i 1 15 '12 E E " 1 I STEP 2: Find the determinant of the matrix found in Step 1. E STEP 3: Find the determinant of the original matrix. S