Determinants Level 17: 2x2 realistic open (no timer). realistic 2x2 signs. 1. Diagonal formula1. Diagonal formulaDown diagonal minus up diagonal.determinant equals-64023075-180ad minus bc equals 97950down: -640 x -180 = 115200up: 230 x 75 = 17250115200 - 17250 = 97950|-640 230; 75 -180|: (-640)x(-180) - 230x75 = 97950.
