#### Answer

quotient $x+3$, remainder $r(x)=0$

#### Work Step by Step

Step 1. Using long division as shown in the figure, we can obtain $\frac{x^2+8x+15}{x+5}=x+3+\frac{0}{x+5}$
Step 2. We can identify the quotient as $x+3$ and the remainder as $r(x)=0$