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{ (x-2)(x+2) ≤ 0
x(x+4) > 0
{ (x-2)(x+2) ≥ 0
x(x+4) < 0
{ x ∈ [-2,2]
x ∈ (-∞ , -4) ∪ (0, +∞)
x ∈ (-∞, -2] ∪ [2, +∞)
x ∈ (-4 , 0)
x ∈ (0 , 2]
x ∈ (-4 , -2]
x ∈ (-4 , -2] ∪ (0 , 2]