### Home > CCA2 > Chapter 6 > Lesson 6.2.4 > Problem6-145

6-145.

This problem is a checkpoint for adding and subtracting rational expressions. It will be referred to as Checkpoint 6B. Homework Help ✎

Add or subtract each pair of rational expressions. Simplify the result.

1. $\frac { 4 } { x ^ { 2 } + 5 x + 6 } + \frac { 2 x } { x + 2 }$

2. $\frac { 3 x ^ { 2 } + x } { ( 2 x + 1 ) ^ { 2 } } - \frac { 3 } { 2 x + 1 }$