Before simplifying realize that division by zero is undefined, as it is not a real value and has no meaning. So x cannot equal -5.
The numerator is a difference of squares of the form:
(a^2-b^2) which always factors to (a-b)(a+b) so
(x-5)(x+5)/(x+5) the (x+5)s cancel leaving:
(x-5), and since x cannot equal -5
A) x-5, (x≠-5)
