Determinants Level 16: 2x2 realistic signed (no timer). realistic 2x2 signs. 1. Diagonal formula1. Diagonal formulaDown diagonal minus up diagonal.determinant equals250-40075120ad minus bc equals 60000down: 250 x 120 = 30000up: -400 x 75 = -3000030000 - (-30000) = 60000|250 -400; 75 120|: 250x120 - (-400)x75 = 60000.
