SOLUTION: Find all values of the variable x for which the rational expression is undefined. 4x+15 / x^2+1x-20 The expression is undefined when x =

Algebra ->  Rational-functions -> SOLUTION: Find all values of the variable x for which the rational expression is undefined. 4x+15 / x^2+1x-20 The expression is undefined when x =       Log On


   

Question 1158949: Find all values of the variable x for which the rational expression is undefined.
4x+15
/
x^2+1x-20
The expression is undefined when x =
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
%284x%2B15%29%2F%28x%5E2%2Bx-20%29

%284x%2B15%29%2F%28%28x-4%29%28x%2B5%29%29--------------undefined at 4, and at -5.