How to prove |Z1Z2Z3| = |Z1||Z2||Z3| ?

I used Z1 = a+bi

Z2 = c+di

Z3 = e+fi and expanded it all out but I could not simplify the expansion to get |Z1||Z2||Z3|

Am I doing it the right way?

Thank you so so so much!

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- Nov 17th 2012, 10:33 AMTutuProving multiplication in complex no
How to prove |Z1Z2Z3| = |Z1||Z2||Z3| ?

I used Z1 = a+bi

Z2 = c+di

Z3 = e+fi and expanded it all out but I could not simplify the expansion to get |Z1||Z2||Z3|

Am I doing it the right way?

Thank you so so so much! - Nov 17th 2012, 10:46 AMPlatoRe: Proving multiplication in complex no