SOLUTION: I need help finding the domain for the following problem: f(x)= {{{x^2-9}}} / {{{x^2-10x+21}}} I hope that I've input the problem correctly. Thanks, Frank

Question 379445: I need help finding the domain for the following problem:
f(x)= /
I hope that I've input the problem correctly.
Thanks,
Frank
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
The domain of a function are all allowable values for x.
The only values of x that WOULDN'T be allowed here are those which make the denominator go to zero...so we set it equal to zero and solve it...
So

Thus the domain is all real numbers except x cannot be 3 or 7.
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