Question 892613
{{{9x^2 +4x+7=3x^2 -8}}}

{{{6x^2 +4x+15=0}}}
{{{6(x^2 +(2/3)x+1/9)+15-6(1/9)=0}}}
{{{6(x+1/3)^2+45/3-2/3=0}}}
{{{6(x+1/3)^2+43/3=0}}}
{{{6(x+1/3)^2=-43/3}}}
{{{(x+1/3)^2=-43/18}}}
{{{x+1/3=0 +- sqrt(43/18)i}}}
{{{x=-1/3 +- (sqrt(86)/6)i}}}