Respostas

  • Usuário do Brainly
2014-08-03T16:16:27-03:00
 x^{2} +4x=-3

 x^{2} +4x+3=0

Δ=b²-4ac
Δ=16-12
Δ=4
√Δ=√4± 2

x \frac{-4+2}{2} =- \frac{2}{2} =-1

x"= \frac{-4-2}{2} =- \frac{6}{2} =-3

R= Os valores são  -3 e -1