Question

Resolva as equações completas do 2° grau
a) x2+5X=6

Answer 1

Δ = 25 + 24 
Δ = 49

x = -5 +-√49/2
x = -5 +-7/2

x' = -5+7/2
x' = 2/2 = 1

x'' = -5-7/2
x'' = -12/2 = -6                  ok