Determinants-kaylaaaa

To find the determinant of a 2 by 2 matrix, you multiply A and D and subtract it from B multiplied by C.

[a b]

[c d]

Number 1

[2 2]

[1 6]

2(6)-2(1)

12-2

10

Number 2

[2 4]

[-6 8]

2(8)-(-6)(4)

16+24

40

Number 3

[2 1 0]

[0 2 3]

[1 0 5]

(2(2)(5)+1(3)(1))

20+3

23