A rational function is defined everywhere except where the denominator evaluates to zero. Set the denominator polynomial equal to zero and solve. The domain of the original function is all real numbers except for the zeros of the denominator.
John
My calculator said it, I believe it, that settles it
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You can put this solution on YOUR website! What function are you trying to write?
x/x^2+3x+2
or ------------If this is not your actual function then write your function correctly, grouping symbols where necessary.