Answer: {−2, 2}.
- A {−2, 2}
- B {2}
- C {4}
- D {−4, 4}
Correct answer: A. {−2, 2}
Explanation: The integer solutions of x² = 4 are −2 and 2.
A Venn diagram makes set identities visual: A∪B is everything inside either circle, A∩B is only the overlap, and the region outside both circles represents the complement of their union - directly illustrating De Morgan's law (A∪B)′ = A′∩B′.
Concept context
Types of sets, operations (union/intersection/complement), relations, and types of functions with domain and range