Question 901428
if yo are given this:u
{{{f(x)=((x+8)(x-8)) / (x^2-64) }}},  you can simplify

{{{f(x)=((x+8)(x-8)) / (x^2-8^2) }}}  

{{{f(x)=((x+8)(x-8)) / ((x-8)(x+8)) }}}

 domain:

{ {{{x}}} element {{{R}}} : {{{x<>-8}}} and {{{x<>8}}} }
(assuming a function from reals to reals)

since {{{f(x)=y=((x+8)(x-8)) / ((x-8)(x+8))=1 }}}

range is:
{ {{{y}}} element {{{R}}} : {{{y = 1}}} }