Question

What is the determinant of the matrix? 9 4 3 -2

Answer 1

If you have the matrix

Answer 2

Then the determinant of this matrix is

Answer 3

You can visually think of it like this

Answer 4

so like 9 x -2= 7 and 4 x 3= 12 then ?

Answer 5

9 * (-2) is not 7 though

Answer 6

18 sorry @jim_thompson5910

Answer 7

-18 actually

Answer 8

a*d - b*c

9*(-2) - 4*3

-18 - 12 = ???

Answer 9

what final answer did you get?