Which function below is the inverse of f(x) = x2 − 25?

x squared over 25
±square root of the quantity x plus 25
±5 times the square root of x
1 over quantity x squared minus 25

Question

Which function below is the inverse of f(x) = x2 − 25?

 x squared over 25
 ±square root of the quantity x plus 25
 ±5 times the square root of x
 1 over quantity x squared minus 25

anonymous · Answer

@jim_thompson5910  @johnweldon1993

anonymous · Answer

if you solve 
$$x=y^2-25$$ for $y$ you get the following 
$$x=y^2-25\
x+25=y^2\
\pm\sqrt{x+25}=y$$

anonymous · Answer

once again the geniuses at FLVS think that 
$$f^{-1}(x)=\pm\sqrt{x+25}$$ is a function, but if course it is not because of the $\pm$

anonymous · Answer

so B

anonymous · Answer

Ya i know

anonymous · Answer

yeah, write to them and tell them that they do not know what a function is

anonymous · Answer

haha i would but i dont wanna get in trouble

anonymous · Answer

give me the id number of this question and i will do it for them
the florida school board should be ashamed