How Do Row Operations Simplify Calculating a 4x4 Determinant?

[teng125]

A=[3 2 4 3 ;2 -1 2 -2 ; 1 2 0 -2 ;-2 -5 -5 -4]

can smby pls show me how to perform this determinants pls

thanx

 

[J77]

You need to expand by minors...

You probably won't get much more help without showing some working.

 

[shmoe]

Do you know how row (or column) operations affect determinants? This can greatly simply things before you expand. Should be in your textbook or notes.