Răspuns :
lg(x²-6x+5)/(3-x)=lg3
(x²-6x+5)/(3-x)=3
x²-6x+5-9-3x=0
x²-3x-4=0
x₁=4
x₂=-1
(x²-6x+5)/(3-x)=3
x²-6x+5-9-3x=0
x²-3x-4=0
x₁=4
x₂=-1
[tex] x^{2} -6x+5=3*(3-x) \\ x^{2} -3x-4=0 \\ x_{1}=-1; x_{2}=4 [/tex]
S={-1}
S={-1}