Answer: The domain of the function
is:
Interval Notation: (-∞ , -7) ∪ (-7 , 0) ∪ (0 , 7) ∪ (7, ∞)
Set-Builder Notation: { x | x ≠ 0 , 7 , -7 }
All real numbers besides 0, 7, and -7.
Step-by-step explanation:
In order to find the domain of your rational function, we need to simplify it:

Remember, most of the time, the domain of a rational function consists of all real numbers besides zero.
To find the domain, we equal the equations in the denominator to zero.

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So all real numbers except for 0, -7, and 7 are in the domain of this rational function.
Answer:
the first sentance is wrong, the second one is right, the third one is right and the last one is wrong
Step-by-step explanation:
The answer is 0. if you simplify 2/4 you get 1/2. think about it. 2 parts of four is half of four, 2 is half of 4. so you get 1/2 - 1/2 which is 0
hope it helps!