1. The problem statement, all variables and given/known data Find the roots of [tex] z^4+4=0 [/tex] and use that to factor the expression into quadratic factors with real coefficients. 2. Relevant equations DeMoivre's formula. 3. 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!!