# SOLUTION: Hi all, I'm having trouble finding the determinant of the following matrix A. Let Matrix A = (2 -1 3) (1 4 4) (1 0 2) Any help would be most appreciated. Thanks, -Nick.

Algebra ->  Algebra  -> Matrices-and-determiminant -> SOLUTION: Hi all, I'm having trouble finding the determinant of the following matrix A. Let Matrix A = (2 -1 3) (1 4 4) (1 0 2) Any help would be most appreciated. Thanks, -Nick.      Log On

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 Algebra: Matrices, determinant, Cramer rule Solvers Lessons Answers archive Quiz In Depth

 Question 226376: Hi all, I'm having trouble finding the determinant of the following matrix A. Let Matrix A = (2 -1 3) (1 4 4) (1 0 2) Any help would be most appreciated. Thanks, -Nick. Answer by mathmontrealmath(2)   (Show Source): You can put this solution on YOUR website!use the diagonal method, repeat the first two columns to the right of the matrix: (2 -1 3)2 -1 (1 4 4)1 4 (1 0 2)1 0 then multiply numbers diagonally starting from the top left: 2.4.2-1.4.1+3.1.0 then - (multiply numbers diagonally starting from the bottom left) 1.4.3-0.4.2-2.1.(-1) add these answers, you get the determinant value: 2.4.2-1.4.1+3.1.0 = 16-4+0=12 1.4.3-0.4.2-2.1.(-1)=12-0+2=14 add: 12+14=26 done