Final answer:
The factors of the expression (y − 6)(x + 5) are the two binomials (y - 6) and (x + 5), making choice a the correct answer.
Step-by-step explanation:
The factors of the expression (y − 6)(x + 5) are simply the two binomials (y - 6) and (x + 5) that are being multiplied together. When an expression is written as a product of two or more other expressions, each of those expressions is called a factor. In choice b, the other pairs listed such as (x - 6) and (y + 5) are not correct because they do not appear in the original expression and would give a different product if combined. Therefore, the correct answer is a: The factors of the expression are (y - 6) and (x + 5).