Question

a union B minus A equal to b minus A

Answer 1

here is your answer hope it wil help you

Answer 2

aUb -a=b-a
 this statement is true




a union b means the set which has elements of a as well as elements of b. if we subtract set a from it, we will get the elements of only set b; which are not common to a.

according to the second equation, subtracting a from b will also give the elements wich are in b and not common to a.



thus the identity 

aUb -a=b-a

is correct