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OpenStudy (anonymous):
Am I correct with this problem... find all numbers that must be excluded from the domain of the rational expression x-9 / x2 + 4x - 45 x ≠-5, x≠9
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OpenStudy (missinglink):
Yes you are correct. The function you have given is undefined when the denominator is equal to zero and the values you found are precisely the numbers which make the denominator equal to zero.
OpenStudy (anonymous):
Woo Hoo! Thanks!
OpenStudy (missinglink):
You are welcome :)
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