I have this question and I need it done bad... Help please? Picture included I was never taught matrix

Question

asked Mar 2, 2019 147k views

1 Answer

Dsmtoday · Answer 1 · 2019-03-06T02:29:26+0000

Multiply the numbers on the major axis which are 2 and -9 to get -18. Subtract from that 3*4 = 12. So -18-12 = -30. That's the determinant.