Question

Resolva as questões do 2• grau: x2+6x+9

Answer 1

x^2+6x+9=0
delta=b^2-4ac
delta=6^2-4.1.9
delta=36-36
delta=0
x=-b-/+ raiz de delta/2a
x=-6-0/2.1
x=-6/2
x=-3
S={-3}