Z=(4+2i(w+w^2)/3-i(w+w^2) =(4-2i)/(3+i)*(3-i)/(3-i) =(12-4i-6i-2)/(9+1)==(10-10i)/10==1+i r=√x^2+y^2 =√1^2+1^2=√2 cosӨ=x/r =1√2 , sinӨ=y/r =-1/√2 Ө=(7π/4) Ө :تقع في الربع الرابع