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Δ=(-8)²-4*1*16
Δ=64-64
Δ=0
x₀=-(-8)/2*1
x₀=8/2
x₀=4
x∈R
2)
Δ=(-6)²-4*1*5
Δ=36-20
Δ=16
√Δ=√16=4
x₁=(6-4)/2=1
x₂=(6+4)/2=5
x∈(1,5)
zadanie2