SOLUTION: find all numbers that must be excluded from the domain of the following rational expression. x+5/x^2+8x+7

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: find all numbers that must be excluded from the domain of the following rational expression. x+5/x^2+8x+7      Log On


   

Question 855785: find all numbers that must be excluded from the domain of the following rational expression. x+5/x^2+8x+7
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Numbers must be excluded if they make the denominator zero since division by zero is undefined.
x%5E2%2B8x%2B7=0
%28x%2B1%29%28x%2B7%29=0
Two solutions:
x%2B1=0
x=-1
and
x%2B7=0
x=-7