Answer:
Integers
Polynomials
Step-by-step explanation:
A set is closed under an operation if performance of that operation on members of the set always produces a member of that set.
so, closed under subtraction means if we subtract two numbers of a set than it must belong to that set.
Integers: They are closed under subtraction.
since, if we subtract two integers it will be an integer only.
Irrational numbers: They are not closed under subtraction.
example- 2+√2 and √2 are two irrational numbers but 2+√2-√2=2 which is not an irrational number
Whole numbers: They are not closed under subtraction.
example- 1 and 2 are whole numbers but 1-2= -1 is not an whole number.
Polynomials: They are closed under subtraction.
