1. The problem statement, all variables and given/known data Determine the only real values a, b, c, and d such that the equation: z4+az3+bz2+cz+d = 0has both z1 and z2 as roots. z1 = 3 + j z2 = -5 + 5j 2. Relevant equations z = x + yj. z = |z|ej[itex]\theta[/itex] 3. The attempt at a solution I am not sure where to begin. I can convert between Cartesian coordinates and Euler's formula but don't know where to go from there. Any help would be greatly appreciated!