Answer:
0 ≤ x ≤ ∞
Step-by-step explanation:
Square roots <em>always</em> need to be either equal to or greater than zero because it should be positive inside (unless we're working with imaginary numbers).
So the domain would be that x ≥ 0 (or the third choice ⇒ 0 ≤ x ≤ ∞).
Answer: (-1,2)
7 and 5
they have variables with them
