SOLUTION: for what vaules are the rational expression undefined? m to the 2nd power minus 2m over 3m plus 6

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Question 279986: for what vaules are the rational expression undefined? m to the 2nd power minus 2m over 3m plus 6
Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
Rational expressions are defined over the set of all real numbers EXCEPT you can not divide by zero. So set your denominator equal to zero and solve.
It takes a bit more math to understand why we can't divide by zero, but if you look at a graph of the function f(x)=1/x, you will see that, if you get close to 0 from the left and right of the y-axis, the function grows quickly in opposite directions.