1. The problem statement, all variables and given/known data Hello! z^2 - (7+2i)z + (12+8i) = 0 3. The attempt at a solution I used the quadratic equation and got: z = (7+2i)/2 +- sqrt( -3/4 - i) r = 5/4, and the argument is Theta = arctan(-1/-3/4) = 0.927 925 - Pi (since x < 0 and y < 0, right?) Then, I know that z = e^theta*i, or z =r * (cos(theta) + i sin(theta)). Hence sqrt(z) = sqrt(r)sqrt(cos(theta) + i sin(theta)) ... But then, I'm stucked... Any suggestion will be very appreciated.