Question 4500
you will have to use the quadratic formula.
{{{x=(-10+-sqrt(10^2-4*1*8))/(2*1)}}}
{{{x=(-10+-sqrt(100-32))/2}}}
{{{x=(-10+-sqrt(68))/2}}}
{{{x=-10+-2sqrt(17))/2}}}
{{{x=-5+-sqrt(17))}}}