Question 627898
{{{3x/(x^2-9)}}} and {{{4/(2x+6)}}}
{{{3x/(x^2-3^2)}}} and {{{4/2(x+3)}}}
{{{3x/(x+3)(x-3)}}} and {{{cross(4)/cross(2)(x+3)}}}
{{{3x/(x+3)(x-3)}}} and {{{2/(x+3)}}}

LCD of {{{(x+3)(x-3)}}} and {{{(x+3)}}} = {{{(x+3)(x-3)}}}