Help!!! Notice that when x = 0 and y = 0, we have x - y = y - x. Does this show that there is a commutative property for subtraction?

A. No. An example does not show that there is a general property.
B. Yes. The commutative property only needs to work sometimes.

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.