Question 314357
{{{(3x)/(x^2-49)=3x/((x-7)(x+7))}}}
Two values are not allowed.
{{{x=7}}} and {{{x=-7}}}.
They are not allowed since then you would have a division by zero which is undefined. 

{{{ graph( 300, 300, -10, 10, -3, 3, 3x/(x^2-49)x-2) }}}