If z1,z2 are complex numbers and a.b are real numbers then |az1−bz2|²+|bz1+az2|²=
O (a2+b2)|z21+z22|
O 1/a2+b2(|z1|2+|z2|²)
O (a2+b2)|z1|+|z2|
O (a2+b2)(|z1|2+|z2|²)