subtract the first row from every other row (this won't change the determinant). this gets you:
next, add every column to the first (this also will not change the determinant) to get:
this shouldn't be too hard to calculate.
subtract the first row from every other row (this won't change the determinant). this gets you:
next, add every column to the first (this also will not change the determinant) to get:
this shouldn't be too hard to calculate.