Verified answer

x^(3) - 4.x = 0

x.(x² - 4) = 0

x = 0 <<--- raiz

x²-4 = 0

x² = 4

x = 2 <<-- raiz

x = -2 <<-- raiz

raizes: -2; 0; 2

X^3-4X=0

x(x²-4)=0

x(x-2)(x+2)=0

x'=0

x"=+2

x'"=-2

0

2

-2