X2+2x+1=0 is a null set or not
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Yes, X is the empty set.
The set you give is the set of numbers that are both (3 or -3) AND 2. Obviously, no number can be both of these, so X is the empty set.
When you 'AND' two propositions, the result is true if and only if both propositions are true.
The set you give is the set of numbers that are both (3 or -3) AND 2. Obviously, no number can be both of these, so X is the empty set.
When you 'AND' two propositions, the result is true if and only if both propositions are true.
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