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Pierwiastkiem równania jest 1
(x-1)(x²+x-2) = 0
Δ = 1+8 = 9
√Δ = 3
x₁ = (-1+3)*0,5 = 1
x₂ = (-1-3)*0,5 = -2
Rozwiązania:
x∈ {-2,1}
zatem x=1 v Δ=1+8=9 √Δ=3
x=1 v x=-2