Question

Rezolvati in R ecuatia:
x2+2x+1=0

Answer 1

Δ=$b^2$-4*a*b=$2^2-4*1*1$=4-4=0
D-ce Δ=0 ⇒ $x_{1}=x_{2}= -\frac{b}{2*a}$=$-\frac{2}{2*1} = -\frac{2}{2} =-1$
S={-1}