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Rezolvati in R ecuatia:
x²+4x-3=2


Răspuns :

x²+4x-3=2
x²+4x-5=0
(Δ=b²-4ac)
       ↓
Δ=16+20
Δ=36
[x₁=(-b-√Δ)/2a]
[x₂=(-b+√Δ)/2a]
       ↓
x₁=(-4 -√36)/2
x₂=(-4+√36)/2
       ↓
   x₁=-5
   x₂=1
X^2+4x-3=2
x^2+4x-5=0
x^2+5x-x-5=0
x(x+5)-(x+5)=0
(x+5)(x-1)=0
x+5=0
x=-5
x-1=0
x=1
S={-5,1}