Determinants Level 2: 2x2 (1-9). 2x2 diagonal difference. 1. Diagonal formula1. Diagonal formulaDown diagonal minus up diagonal.determinant equals8246ad minus bc equals 40down: 8 x 6 = 48up: 2 x 4 = 848 - 8 = 40|8 2; 4 6|: 8x6 - 2x4 = 40.
