1. The problem statement, all variables and given/known data Evaluate the following determinant by expressing the matrix in upper triangular form. 2. Relevant equations row operations. 3. The attempt at a solution http://yfrog.com/jnscan0001ugj http://img707.imageshack.us/img707/6379/scan0001ug.jpg I want to know what I did wrong there cause I cant figure it out the calculator shows a different answer.