### Home > CCA2 > Chapter 1 > Lesson 1.2.1 > Problem 1-71

Consider and

*. 1-71 HW eTool (Desmos) Homework Help ✎*

Use any method to find the points of intersection of

and.One method is to graph

*f*(*x*) andon the same set of axes and locate the point of intersection.To graph

, make a table. You will need to use*x*-values fromto.To use the equations, set

and solve the resulting quadratic equation.Another method would be to make a table of values for each function and compare table values to find matches.

Two points of intersection: (−1, 9) and (5, 21).

Calculate

.Substitute:

Simplify:

Calculate

.How is this different from

?Remember to put parentheses around

and use the Distributive Property correctly.

Use the blank graph in the eTool below to solve the problem.

Click the link at right for the full version of the eTool: CCA2 1-71 HW eTool