Question 888526
Your should use parentheses to help readability.
Remember dividing by a fraction is the same as multiplying by its reciprocal.
{{{(12/(x-3))/(9/(x^2-9))=(12/(x-3))*((x^2-9)/9)}}}
{{{(12/(x-3))/(9/(x^2-9))=(4/(x-3))*(((x-3)(x+3))/3)}}}
{{{(12/(x-3))/(9/(x^2-9))=(4/3)(x+3)}}}