Question

what are the complex roots of x cubed +8 =0

Answer 1

factor it using the sum of cubes... the complex roots comes from the quadratic factor....

Answer 2

real cubed root is -2
other two are equally spaced about the circle of radius 2 centered at the origin

Answer 3

or what dpalnc said
x^3+8=0
(x+2)(x^2-2x+4)=0 use the quadratic formula for the second two

Answer 4

sure it does....