Let A = (5364) Then |A| = (5364) = 20 - 18 = 2 Hence A-1 = 1∕|A|(4−3−65) = 1∕2(4−3−65) = (4×1∕2−3×1∕2−6×1∕25×1∕2) = (2−3∕2−35∕2)