Question

Resolva a equação: x²-6x+9=0

Answer 1

x^2-6x+9=0
delta=b^2-4.a.c
delta=(-6)^2-4.1.9
delta=36-36
delta=0
x=-b-/+ raiz de delta/2a
x=-(-6)-0/2.1
x=6-0/2
x=6/2
x=3