x³ - 4x < 0
x(x² - 4) < 0
x(x - 2)(x + 2) < 0
- + - +
₀₀₀
- 2 0 2
x ∈ (- ∞ ; - 2) ∪ (0 ; 2)
_____________________
x³ - 4x < 0
x(x² - 4) < 0
x(x - 2)(x + 2) < 0
- + - +
₀₀₀
- 2 0 2
x ∈ (- ∞ ; - 2) ∪ (0 ; 2)
_____________________