Question

respostas certas preciso para hoje por favor obrigada​

Answer 1

A = |3 2 5| 3 2

|4 1 3| 4 1

|2 3 4| 2 3

A = (3 . 1 . 4) + (2 . 3 . 2) + (5 . 4 . 3) - (2 . 1 . 5) - (3 . 3 . 3) - (4 . 4 . 2)

A = 12 + 12 + 60 - 10 - 27 - 32

A = 84 - 69

A = 15

B = |0 3 0| 0 3

|-2 3 1| -2 3

|4 -2 5| 4 -2

B = (0 . 3 . 5) + (3 . 1 . 4) + (0 . (-2) . (-2)) - (4 . 3 . 0) + (-2 . 1 . 0) - (5 . (-2) . 3)

B = 0 + 12 + 0 - 0 + 0 + 30

B = 12 + 30

B = 42

C = |2 2 0| 2 2

|1 1 1| 1 1

|4 3 0| 4 3

C = (2 . 1 . 0) + (2 . 1 . 4) + (0 . 1 . 3) - (4 . 1 . 0) - (3 . 1 . 2) - (0 . 1 . 2)

C = 0 + 8 + 0 - 0 - 6 - 0

C = 8 - 6

C = 2