Question

Alguém sabe a 30? Matrizes e determinantes

Answer 1

|x...x|
|5...x| = - 6

x² - 5x = -6
x² - 5x + 6 = 0
/\ = (-5)² - 4.1.6
/\ = 25 - 24
/\ = 1
x = (-b+/-\/1)/2.1
x = [-(-5)+/-1]/2
x = (5+/-1) / 2
x' = (5+1) / 2 --> x' = 6/2 --> x' = 3
x" = (5-1) / 2 --> x" = 4/2 --. x" = 2
S: {2; 3}