Log15(x²-4x+3)<1
Log15(x²-4x+3)<log 15
x²-4x+3<15
x²-4x-12<0
x₁+x₂= 4
x₁*x₂= -12
x₁=6
x₂= -2
x ∈ (-2; 6)
Log15(x²-4x+3)<1
Log15(x²-4x+3)<log 15
x²-4x+3<15
x²-4x-12<0
x₁+x₂= 4
x₁*x₂= -12
x₁=6
x₂= -2
x ∈ (-2; 6)