Question 72479
While I understand the problem, I need help with the fractions!  
I get for x = -b/2a  =>  {{{-1/(2(-625/8))}}}  
{{{-1/(2(-625/(2*4)))}}}
{{{-1/(-625/4)}}}
Which is -1 divided by -625/4, flip and multiply by the reciprocal.
{{{-1*(-4/625)}}}
{{{4/625}}}
Happy Calculating!!!!