All real numbers are solutions.
Yes, it is a function, because for any given number x as argument there is one and only one function value equal x^2 - 5.
Those are the pictures on how to do it and the answer is there
Answer:
Hola, no entiendo el inglés, ¿está ahí? Podría ser en español.
Step-by-step explanation:
The answer is
A. 1.7320508