A(2,4)-B(3,8)= A(2,4)
If A and B are two sets, then their difference is given by A - B or B - A.
A - B means elements of A which are not the elements of B.
As in the question both set A & B are disjoint sets because they have no common elements.
so,If A and B are disjoint sets, then A – B = A and B – A = B
A(2,4)-B(3,8)= A(2,4)