Question 305949
Can't be factored neatly.
Use the quadratic equation to find the solution.

{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-48 +- sqrt( 48^2-4*3*16 ))/(2*3) }}}
{{{x = (-48 +- sqrt( 2112))/6 }}}
{{{x = (-48 +- 8*sqrt( 33))/6 }}}