Question

2) x2 - 8x + 12 = 0
a) ( ) (2 e 6)
b) ( ) (- 6 e 2)
c)( )(6-2)
d)( )(3.4)
e) ( ) N.D.A​

Answer 1

Resposta:

a) 2 e 6

Explicação passo-a-passo:

x² - 8x + 12 = 0

a= 1; b = -8; c = 12

D = -8² - 4 . 1 . 12

D = 64 - 48

D = 16

x' = -(-8) + 4

2 . 1

x' = 8 + 4

2

x' = 12

2

x' = 6

x" = -(-8) - 4

2 . 1

x" = 8 - 4

2

x'' = 4

2

x'' = 2