### Home > PC3 > Chapter 7 > Lesson 7.2.2 > Problem7-88

7-88.

Given the function $f(x)=x^2+3x+2$, show that the average rate of change from $x=4$ to $x=4+h$ is $11+h$.

$\frac{f(4+h)-f(4)}{4+h-4}=\frac{(4+h)^2+3(4+h)+2-(4^2+(3)(4)+2)}{4+h-4}=?$