Question

Which of the following is an empty set:
a) {x : xR and x2 – 1 = 0}
b) {x : xR and x2 + 1 = 0}
c) {x : xR and x2 – 9 = 0}
d) {x : xR and x2 = x + 2}



pls explain it also​

Answer 1

Answer:

a

b

c

is the empty set

I hope this answer will help you