Final answer:
The statement which doesn't apply to the difference of two squares is D) The operation is addition, because the operation involved is subtraction, resulting in expressions like a² - b² being factored as (a + b)(a - b).
Step-by-step explanation:
When considering the difference of two squares, the correct statements are that it has only two terms, the first term is a perfect square, and the last term is a perfect square. The operation involved in the difference of two squares is subtraction, not addition. Therefore, the statement that does not belong is D) The operation is addition.
In the context of algebra, the difference of two squares refers to an expression of the form a² - b², which can be factored into (a + b)(a - b). Both a and b are perfect squares, meaning that they can be expressed as some number squared (e.g., 4 is a perfect square because it can be expressed as 2²).