Question 810588
this equation means
{{{x=-2 + sqrt(-4)}}}
or
{{{x=-2 - sqrt(-4)}}}
 

solve both to get the answers.
{{{i=sqrt(-1)}}}
use i when you have a negative number in the squareroot.


{{{x=-2 + sqrt(-4)}}}
{{{x=-2+2i}}}

or

{{{x=-2 - sqrt(-4)}}}
{{{x=-2-2i}}}