not sure where this other three came from, or how I'm supposed to simplify.

in this part, multiply root of 3 by the terms of the parenthesis. This is
[tex]\frac{\sqrt[]{3}\cdot\sqrt[]{3}+\sqrt[]{3}\cdot\sqrt[]{x}}{(\sqrt[]{3})^2-(\sqrt[]{x})^2}[/tex]then solve the numerator and denominator
[tex]\frac{3+\sqrt[]{3x}}{3-x}[/tex]thats the answer simplified