Question

usando a regra de sarrus. Calcule o valor determinante das matrizes​

Answer 1

A)

D=|4 -1 0| 4 -1

|5 7 6| 5 7

|2 1 3| 2 1

D=4.7.3+(-1.6.2)+0-0-(6.4.1)-(3..5.-1)

D=84-12-24+15

D=63

B)

D=|2 3 0| 2 0

|0 1 2| 0 1

|1 3 2| 1 3

D=2.1.2+3.2.1+0-3.2.2-0

D=4+6-12

D=-2