Question

bhascara x levado a quadrado +6x +8 +0

Answer 1

x² + 6x+8 = 0

Δ = 36 - 32
Δ = 4

x = - 6 +-√4/2
x = -6 +-2/2

x' = -6 +2/2
x' = -4/2 = -2

x'' = -6-2/2
x'' = -8/2 = -4        ok