Posted by **Soly** on Thursday, September 13, 2007 at 9:02pm.

Could you please check my answers and help me with one?

Find the domain of the function.

f(x)=-8x-2

-I got the domain being (negative infinity, postive infinity).

g(x)= 3x/x^2 -49 (This one I don't understand how to find the domain)

- Algebra -
**bobpursley**, Thursday, September 13, 2007 at 9:17pm
yes on domain

I assume the second is g(x)=3x/(x^2-49)

can x be +-7 ?

- Algebra -
**Soly**, Thursday, September 13, 2007 at 9:33pm
I try to figure out it, and since x^2-7 is a perfect square (x+7)(x-7), I thought x couldnt be +-7?

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