Question

Can someone please explain how to do this function? See attached

Answer 1

Yes

Answer 2

The domain is the values that I can substitute with it freely without making the
Rational function is undefined (its denominator equal to zero)

Therefore we can substitute with all real number except that make x^2-3x-10 equal to zero
\[x^2-3x-10=0\]
\[(x-5)(x+2)=0\]
\[x=5 and x=-2\]

So the domain will be Real numbers-{5,-2}

Answer 3

Thank for the medal!
Any time, I will not be late for you