SOLUTION: For what values of x are the following expressions defined? a)the root of x squared + 1 I have the answer and it says x can be all real numbers but I don't know why?? Can

Algebra ->  Rational-functions -> SOLUTION: For what values of x are the following expressions defined? a)the root of x squared + 1 I have the answer and it says x can be all real numbers but I don't know why?? Can       Log On


   

Question 786078: For what values of x are the following expressions defined?
a)the root of x squared + 1
I have the answer and it says x can be all real numbers but I don't know why??
Can you please help me?
Thank you very much!
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28x%5E2+%2B+1%29
x can be all real numbers as
you will never produce a negative value under
the square root(even with negative values
of x)
Hope this helps.
:-)