we want to divide
[tex]\frac{x}{x-6}\div\text{ }\frac{x+6}{x}[/tex]That is equivalent to say:
What we do next is multiply the extremes and multiply the expressions that are in the middle, like this:
that is equivalent to say:
[tex]\frac{(x\text{ )(x)}}{(x-6)(x+6)}\text{ = }\frac{x^2}{x^2-6^2}[/tex]so the correct answer is: the quotient of the rational expressions is:
[tex]\frac{x}{x-6}\div\text{ }\frac{x+6}{x}\text{ = }\frac{x^2}{x^2-6^2}\text{ = }\frac{x^2}{x^2-36^{}}[/tex]