Question 371062
You're missing an exponent. 
Should it be {{{9x^2}}}???
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{{{9x^2=48x-48}}}
{{{9x^2-48x-48=0}}}
{{{3x^2-16x-16=0}}}
Use the quadratic formula,
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (16 +- sqrt( 16^2-4*3*(-16) ))/(2*3) }}}
{{{x = (16 +- sqrt( 256+192 ))/(6) }}}
{{{x = (16 +- sqrt( 448))/(6) }}}
{{{x = (16 +- 8sqrt( 7))/(6) }}}
{{{highlight(x = (8 +- 4sqrt( 7))/(3)) }}}