Question

funcao F(x)= x² -6x+8

Answer 1

x^2-6x+8=0
delta=b^2-4ac
delta=(-6)^2-4.1.8
delta=36-32
delta=4
x=-b-/+ raiz de delta/2a
x=-(-6)-2/2.1
x=6-2/2
x=4/2
x=2
x=-(-6)+2/2.1
x=6+2/2
x=8/2
x=4
S={2, 4}