Lesson 3

Are You Ready?

Answer the questions and check your solutions. If you are experiencing difficulty, you may want to use the information in the Refresher section to clarify concepts before moving on to the Discover section.

Simplify the following variable expressions by adding or subtracting. If an expression cannot be simplified, explain why not.

1. 5x3 + 3x3 Answer
   
   
2. 4x3 − 2x4 Answer
   
   
3. x3 + x2 Answer
   
   
4. 5x3 − 3x3 Answer
   
   
5. 3(x − 2)2 + 4(x − 2)2 Answer
   
   
6. 6(n + 4)3 − 3(n + 4)2 Answer