SOLUTION: 7x-28 ------ x^2-16 can you help me simplify the equation and then show the restrictions?

Algebra ->  Rational-functions -> SOLUTION: 7x-28 ------ x^2-16 can you help me simplify the equation and then show the restrictions?      Log On


   

Question 178781: 7x-28
------
x^2-16
can you help me simplify the equation and then show the restrictions?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
%287x-28%29%2F%28x%5E2-16%29
:
7%28x-4%29%2F%28x%2B4%29%28x-4%29
:
7cross%28%28x-4%29%29%2F%28x%2B4%29cross%28%28x-4%29%29
:
7%2F%28x%2B4%29
:
restrictions are x can be all real numbers except for -4. -4 would put a zero in the denominator and that would make this undefined, therefore it is not allowed.