Respostas

  • Usuário do Brainly
2013-10-04T13:40:55-03:00
4x" + 12x + 9 = 0
delta = b" -4ac
delta = (12)" - 4.4.9
delta = 144 - 144
delta = 0

x = - b +_ raiz de delta / 2.a
x = - 12 +_ 0 / 8

x' = - 12 + 0 / 8
x' = - 12/8 simplifica por (4)
x' = - 3/2

x'' = - 12 - 0/8
x'' = -12/8
x'' = -3/2

x' = x"
1 2 1