Question 887618
{{{x^2+3x+1=0}}}
{{{(x^2+3x+9/4)+1=9/4}}}
{{{(x+3/2)^2=9/4-4/4}}}
{{{(x+3/2)^2=5/4}}}
{{{x+3/2=0 +- sqrt(5/4)}}}
{{{x=-3/2 +- sqrt(5/2)}}}
{{{x=(-3 +- sqrt(5))/2}}}