Wpis z mikrobloga

@Eggy:

x^6 - 4x^5 - x^4 + 20x^3 - 20x^2 = 0
x^2(x^4 - 4x^3 - x^2 + 20x - 20) = 0
x^2(x^4 - 2x^3 - 2x^3 + 4x^2 - 5x^2 + 10x + 10x - 20) = 0
x^2(x^3(x-2) - 2x^2(x-2) - 5x(x-2) + 10(x-2)) = 0
x^2(x-2)(x^3 - 2x^2 - 5x + 10) = 0
x^2(x-2)(x^2(x-2) - 5(x-2)) = 0
x^2(x-2)^2(x^2 - 5) = 0
x^2(x-2)^2(x - sqrt(5))(x