### Home > CCA > Chapter 7 > Lesson 7.2.2 > Problem 7-99

7-99.

If , find the value of the expressions in parts (a) through (c) below. Then complete parts (d) through (f).

*7-99 HW eTool*(Desmos) Homework Help ✎

Substitute

for and simplify.

Refer to part (a).

Refer to part (a).

What value of

gives?Substitute

for and solve for.Where does the graph of this function cross the

-axis? The-axis?A function crosses the

-axis at, and a function crosses the-axis at.If

, find.

Use the eTool below to find the value of each expression in parts (a) through (c).

Click on the link at right for the full eTool version: CCA 7-99 HW eTool