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

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Question 174572: Which numbers cannot be used in place of the variable in the rational expression:
2y + 1
y^2 – y - 6
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
if this is %282y%2B1%29%2F%28y%5E2-y-6%29 as I suspect it is......then the denominator cannot be zero.
:
therefore set y%5E2-y-6=0and solve
:
%28y-3%29%28y%2B2%29=0
:
y cannot be system%28y=3%2Cy=-2%29