Answer:

AB={1,2,4,5,7,8} or AB={1,2,4,5,7,8}

Step-by-step explanation:

A={1,2,4}

B={5,7,8}

try mong I subtract Ang same number sa A at B dahil Wala syang same na number pagsasamahin mo lahat at Ang maging sagot at AB={1,2,4,5,7,8} or A-B={1,2,4,5,7,8}