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x²+2x+1+x-3<x-4
x²+2x+2<0
Δ= 4-4
Δ=0
x₀= -2/2
x₀= -1
2. f(x) =(x+4)(x²-3x-2)
Δ=9+8
Δ=15
x₁=-3-√15/2
x₂= -3+√15/2
x₃=-4