Question 1056414
Complete the square,
{{{x^2+4x+8=0}}}
{{{(x^2+4x+4)+8=4}}}
{{{(x+2)^2=-4}}}
{{{x+2=0 +- sqrt(-4)}}}
{{{x+2=0 +- 2i}}}
{{{x=-2 +- 2i}}}