Mathematics

Julie Boyd

19 April, 05:49

sing a cofactor expansion across the first row. Also compute the determinant by a cofactor expansion down the second column. StartAbsoluteValue Start 3 By 3 Matrix 1st Row 1st Column 6 2nd Column negative 6 3rd Column 9 2nd Row 1st Column 9 2nd Column 3 3rd Column 6 3rd Row 1st Column 3 2nd Column 9 3rd Column negative 3 EndMatrix EndAbsoluteValueWrite the expression for the determinant using a cofactor expansion across the first row. Choose the correct answer below. A. Using this expansion, the determinant is (6 ) (negative 63 ) plus (negative 6 ) (negative 45 ) plus (9 ) (72 ). B. Using this expansion, the determinant is (6 ) (45 ) plus (negative 6 ) (99 ) plus (9 ) (90 ). C. Using this expansion, the determinant is (6 ) (negative 63 ) minus (negative 6 ) (negative 45 ) plus (9 ) (72 ).