Question

x ao quadrado mais 6x mais 5

Answer 1

x²+6x+5=
x=(-b±√b²-4ac):2
x=(-6±√36-4.1.5):2
x=(-6±√36-20):2
x=(-6±√16):2
x=(-6±4):2

x1=(-6+4):2
x1=-2:2
x1=-1

x2=(-6-4):2
x2=-10:2
x2=-5

Answer 2

 x^{2} +6x+5=0
Δ = b² + 4ac
Δ= 36-20
Δ= 16

x= -6 +- √16 /2a
x1= -6+4/2 = 
-2/2 = -1 

x2= -6-4/2 =
-10/2 =-5        

S={-1,-5}