Respostas

  • Usuário do Brainly
2014-06-02T17:12:57-03:00


2x²+2x-24=0  (:2)

x²+x-12=0

Δ=1+48=49

x=(  -1+7)/2=6/2 = 3

x=( -1-7)/2 = -8/2 =-4                     S= {-4,3}

2 4 2