Question

Prove | Z1Z2 | = |Z1| |Z2|

Answer 1

Answer:

. |z1z2| = |z1||z2|

Proof: |z1z2| = |(x1+y1i)(x2+y2i)| =

square 1 = square (x**2 + y**2)square (x**2 + y**2) = |z1||z2|.