Question 750917
{{{(w^2 - 9)/(w^2 - 4w - 21)}}}


{{{((w-3)(w+3))/((w-7)(w+3))}}}


{{{((w-3)highlight((w+3)))/((w-7)highlight((w+3)))}}}


{{{((w-3)cross((w+3)))/((w-7)cross((w+3)))}}}


{{{(w-3)/(w-7)}}}


Final Answer: {{{(w-3)/(w-7)}}}