Sum means to Add.
So the sum of d and 9 would be d + 9
Answer:

Step-by-step explanation:
Given

Required
Factor using a negative factor
Express each term as a factor of -5

Factor out -5

Hence:
<em>The factored form of </em>
<em> is </em>
<em></em>
The x intercept is:
(3/2,0)