Homework Help: Math

Posted by Suzanne on Sunday, April 24, 2011 at 10:08pm.

I need to find the domain of
f(x) = (3x+3)/ (x^2 -3).

I keep getting (U SQUARE Root of 3 and - Square root of 3 U ) Does that mean that the answer is all real numbers?
I know that x can not=3, What am I doing wrong? Thanks.

Math - MathMate, Sunday, April 24, 2011 at 11:04pm
x² cannot be 3, so
x cannot be √3 nor -√3.

The domain is therefore
R - (√3∪-√3)

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