Question

can someone check if my answer in matrix 4x4 determinant in first row is correct?

Answer 1

\[1,2,1,-4\]
\[4,-1,4,2\]
\[0,-3,5,3\]
\[5,0,2,1\]

Answer 2

A = 5

Answer 3

@zepdrix

Answer 4

@Callisto

Answer 5

@rebeccaxhawaii

Answer 6

Its correct

Answer 7

I don't think it is. When we do this about a row, you have a plus minus thing going on, so your +2 should be -2

Also that last one should have a +4 on the outside not a -1