Question

F(x)=x²+6x+8 presciso disso agr

Answer 1

f(x) = x² + 6x + 8

Δ= b² - 4ac
Δ= 6² - 4 * 1 *8
Δ= 36 - 32
Δ= 4 > 0(Há duas raízes reais distintas)

x =(- b ±√Δ)/2*a
x = - 6 ±√4/2*1
x = - 6 ± 2/2

x' = - 6 + 2/2
x' = - 4/2
x' = - 2

x" = - 6 - 2/2
x" = - 8/2
x" = - 4

S = {- 2, - 4}