A.)Sum of two integers is always an integer. B.)difference of two integers is always are integer. OPTIONS : A.) A and B are true. B.)A and B are false. C.)A are true B are false. D.)A are false B are true.

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.