Question 974338
x^2-4x+8=0

quadratic formula
x=  (1/2) 4+/- sqrt (16-32)   ;;sqrt (-16)

=(1/2) 4+/- 4i
=2+2i; 2-2i

Check using the first

4+8i+4i^2-8-8i+8=
(4*i^2=-4)

4-4+8i-8i+8-8=0