Question 308326
Using the quadratic formula,
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x1 = (-b + sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x2 = (-b - sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x1+x2 = (-2b)/(2*a) }}} 
{{{x1+x2=-b/a}}}
{{{x1+x2=-3/5}}}