- #1
Nathew
Homework Statement
Find the roots of [tex] z^4+4=0 [/tex] and use that to factor the expression into quadratic factors with real coefficients.
Homework Equations
DeMoivre's formula.
The Attempt at a Solution
I have been able to identify they are [tex] \pm 1 \pm i [/tex] but i have no idea how to factor the expression.
Thanks!