SOLUTION: Find the values that make the rational expression undefined. {{{(r+6)/(r^2-r-6)}}}

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Question 92102: Find the values that make the rational expression undefined.


%28r%2B6%29%2F%28r%5E2-r-6%29
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
Find the values that make the rational expression undefined.


%28r%2B6%29%2F%28r%5E2-r-6%29
Anything that would make the denominator =0 would make the expression undefined:
r%5E2-r-6=0
Factor.
%28r-3%29%28r%2B2%29=0
Set each factor = to 0 and solve for r.
r-3=0 or r+2=0
r-3+3=0+3 or r+2-2=0-2
r=3 or r=-2
Makes the expression undefined.
Happy Calculating!!!!