Question

As raízes de x2-6x+9=0 são?

Answer 1

x² - 6x + 9 = 0 

Δ = 36 - 36 

Δ = 0 

x = 6 +-√0/2

x = 6+-0/2

x' = 6+0/2
x' = 6/2
x' = 3 

x'' = 6-0/2
x'' = 6/2
x'' = 3                                      S = { 3 }                 ok

Answer 2

x²-6x+9=0

a=1, b=-6, c=9

delta=b²-4.a.c

delta= -6²-4.1.9
delta= 36-36
delta= 0

x=-b±√delta/2.a

x=6±√0/2.1

x= 6+0/2= 6/2= 3

x= 6-0/2= 6/2= 3


s={3}