### Home > A2C > Chapter 7 > Lesson 7.2.3 > Problem7-135

7-135.

Add or subtract each expression below. Be sure to simplify.

Factor after adding or subtracting.

In part (d), notice that the denominators are different. Find a common denominator before adding.

1. $\frac { x ^ { 2 } } { x - 5 } - \frac { 25 } { x - 5 }$

2. $\frac { a ^ { 2 } } { a + 5 } + \frac { 10 a + 25 } { a + 5 }$

3. $\frac { x ^ { 2 } } { x - y } - \frac { 2 x y - y ^ { 2 } } { x - y }$

4. $\frac { x } { x + 1 } + \frac { 1 } { x - 1 }$