Question 135282
You should have:


{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-(-8) +- sqrt( (-8)^2-4*1*16 ))/(2*1) }}}


If you got that far and then did the arithmetic correctly, you should be fine.  If you write back, show the work you did, or at least share the answer you got.