Let a and b be rational numbers.

The difference of a and b is:

Answer Choices:

(always rational, sometimes rational, never rational).

The product of a and b is:

Answer Choices:

(always rational, sometimes rational, never rational).

√ab is

Answer choices:

(always rational, sometimes rational, never rational).

The difference of a and b is sometimes rational.

The product of a and b is always rational.
√ab is sometimes rational.