We present here the answers to the exercises in rational expressions.
Answer to Exercise 1
The domain is the set of all real numbers except 10.
Answer to Exercise 2
The domain is the set of all real numbers except 9 and -1.
Answer to Exercise 3
The domain is the set of all real numbers except -1.
Answer to Exercise 4
The domain is the set of all real numbers except -2 and 2.