Write the set {x : x is a natural number and x2-9=0} in roster form.
A. {3}
B. {-3}
C. {3,-3}
D. {9,3}
Answer:A
Write the set {x : x is a natural number and x2-9=0} in roster form.
A. {3} B. {-3} C. {3,-3} D. {9,3}