### Home > PC > Chapter 9 > Lesson 9.1.3 > Problem 9-45

9-45.

Substitute

(3 + *h*) for every '*x*' in the '*f*' function. Simplify.

20*xh* + 10*h*^{2}

Substitute (20+*h*) for every '*x*' in the '*g*' function. Simplify.

Substitute

(15 − 3*x*) for every '*x*' in the '*f*' function. Simplify.

2250 − 900*x* + 90*x*^{2}