Question

For which values of x is the expression undefined?

\frac{x^2-9}{x+6}x+6x2−9​

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Answer 1

Answer: x4 + 6x3 - 3x2 - 54x - 9

Explanation:

That is what i got does that look correct?

I'm not sure if that is right so please don't answer if you will be mad if it is wrong.