Question 123607
{{{6x^2+19x+31=0}}}
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x = (-19 +- sqrt( 19^2-4*6*31 ))/(2*6) }}} 
{{{x = (-19 +- sqrt( 361-744 ))/(12) }}} 
{{{x = (-19 +- sqrt( -383 ))/(12) }}} 
383 is a prime number. 
{{{x = (-19 +- sqrt( 383 )i)/(12) }}}