Question

qual resposta certa x²+9x+8=0

Answer 1

x^2+9x+8=0
delta=b^2-4ac
delta=9^2-4.1.8
delta=81-32
delta=49
x=-b-/+ raiz de delta/2a
x=-9-7/2.1
x=-16/2
x=-8
x=-9+7/2.1
x=-2/2
x=-1
S={-8, -1}