Answer:
factor
Step-by-step explanation:
We assume this is a vocabulary question and you want the word that has the definition you have supplied.
Such an expression is called a <em>factor</em>.
I wanted to be king because I saw dream of king
one day when I visit to dentist
Dentist: "You need a crown." -
Patient: "Finally someone who understands me"
D.(m-6)(m-8) is the answer