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For what value of x is the rational expression below undefined? (3x-12)/(9-x)
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5 votes
For what value of x is the rational expression below undefined?
(3x-12)/(9-x)

User Shadi Shaaban
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1 Answer

4 votes
When x=9 the expression is undefined.

That is because any number over 0 is undefined, including 0/0.
User Grabner
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