A. 42
B. 48
C. 52
D. 64
The modulus of (3-4i)(4+5i) is
The conjugate of (1+2i) (2-3i) is
If x=-5+4i then x4+9x3+35x2-x+4=
The modules of √3+i/(1+i)(1+√3i) is
(1+ω-ω2) (1-ω+ω2)=