Odpowiedź:
2x³ - 5x² + 2x = 0
x(2x² - 5x + 2) = 0
x = 0 ∨ 2x² - 5x + 2 = 0
2x² - 5x + 2 = 0
a = 2 , b = - 5 , c = 2
Δ = b² - 4ac = (- 5)² - 4 * 2 * 2 = 25 - 16 = 9
√Δ = √9 = 3
x₁ = (- b - √Δ)/2a = (5 - 3)/4 = 2/4 = 1/2
x₂ = (- b + √Δ)/2a = (5 + 3)/4 = 8/4 = 2
x = 0 ∨ x = 1/2 ∨ x = 2
odp: x₀ = { 0 , 1/2 , 2 }
