Find the domain for the rational function f(x)=4x/(3x-12)
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this is very simple. all you really need to look at is the q(x) or your denominator. then you need to factor. it will look like this:

(x+_) (x-_)

Then all you need to do is make thoes two numbers equal 0 and then right your domian like this:

{x|x not equal to _,_}

then that is your domian.
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