If possible evalute the function at the given values of the variable.

Question

f(x)=√x-4    x=13,0

Answer 1

Let's clarify something: Is it really √x - 4, or is it √(x - 4) ?

 

For x = 13, if it's √x - 4, then we have √13 - 4, which can't be simplified. If it's √(13 - 4), then it's √9 = 3

 

For x = 0, we have either √0 - 4 = -4, or √(0 - 4) =  √(- 4) which is an imaginary number, 2i