Was hindert es dich das auszurechnen?
[2, 4, 2, -2, -2; 3, 0, 0, 3, 3; 2, 2, 4, -2, 3; 1, -2, 3, -4, -2]·[2, -1, 5, 3; 4, 2, 5, -2; 1, 3, -2, -5; -3, -3, 3, -3; 5, 3, 5, -3] - 2·[-4, 0, 0, -4; -2, -2, 2, 4; -5, -3, 5, -4; 1, 2, 3, -2]`
= [26, 16, 20, -2; 12, 1, 45, -13; 37, 25, 11, -27; 7, 2, -25, 14]