Question 377298
{{{x^2+ 7x + 3 = 0}}}
{{{(x^2+7x+49/4)+3=49/4}}}
{{{(x+7/2)^2=49/4-12/4}}}
{{{(x+7/2)=37/4}}}
{{{x+7/2=0 +- sqrt(37)/2}}}
{{{highlight(x=-7/2+- sqrt(37)/2)}}}