SOLUTION: Which numbers cannot be used in place of the variable in each rational expression? 2y+1/y^2-y-6

Algebra ->  Algebra  -> Rational-functions -> SOLUTION: Which numbers cannot be used in place of the variable in each rational expression? 2y+1/y^2-y-6      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 200244: Which numbers cannot be used in place of the variable in each
rational expression?
2y+1/y^2-y-6
Answer by vleith(2517) About Me  (Show Source):
You can put this solution on YOUR website!
%282y%2B1%29%2F%28y%5E2-y-6%29
Which y is disallowed? Any y that results in the denominator becoming 0
Which y make the denominator 0?
y%5E2+-+y+-+6+=+0
%28y-3%29%28y%2B2%29+=+0
So y = 3 and y =-2 cannot be used (not in the domain)