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W(x) = 0
-x³ - x² + 6x = 0 |*(-1)
x³ + x² - 6x = 0
x(x² + x - 6) = 0
x₀ = 0 v x² + x - 6 = 0
Każda liczba pomnożona przez 0 daje 0
x₀ * x₁ * x₂ = 0
Odp. A. 0