Answer:
Two subsets that form set of real numbers
You can take positive numbers and negative numbers subset
One subset become (- infinity,0]
other subset (0, infinity)
Answer:
c
Step-by-step explanation:
I think this is right
Answer:
or 
Step-by-step explanation:
I assume the denominators are x + 5 and x + 4 although that is not what you wrote.






or 
or 
or 
The answer is 3. have a good day