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Answer:
{-2}
Step-by-step explanation:
You want the solution set for the inequality 4(x +2)² ≤ 0.
The expression on the left cannot be negative, but it can be zero when ...
x +2 = 0 ⇒ x = -2
The only solution to this inequality is x = -2.
Expressed as a set of solutions, we have ...
x ∈ {-2}