Question

2) Determine as raízes da função f(x) = x² - 5x +6. *​

Answer 1

Resposta:

X' = 3

X" = 2

Explicação passo-a-passo:

f (x) = x² - 5x + 6

a = 1 ; b = -5 ; c = 6

∆ = b² - 4 × a × c

∆ = (-5)² - 4 × 1 × 6

∆ = 25 - 24

∆ = 1

X = (-b +/- √∆) ÷ (2 × a)

X = (5 +/- 1) ÷ (2 × 1)

X' = (5 + 1) ÷ (2 × 1)

X' = 6 ÷ 2

X' = 3

X" = (5 - 1) ÷ (2 × 1)

X" = 4 ÷ 2

X" = 2