86/4 = 21.5 *5 Or more, raise the score* (rounds to 22) you should have 2 lightbulbs left over but you would be 2 lightbulbs short if you were to get 21 packages as opposed to 22
For this problem, we are going to use the Remainder Theorem. This says that for to be a factor of a polynomial , then . Essentially, it says that is a factor if when you substitute into the polynomial you get a result of 0.
Thus, in our case, when we substitute into the polynomial, we should get an answer of 0 if is a factor of the polynomial. Given this information, we can solve for :