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# Help with this complex numbers question watch

1. Prove |z1z2|=(z1)(z2) if z1=1+isqrt3 and z2=-3-3i
2. I think I must be interpreting this wrong. When you say (z1)(z2), do you just mean the product of the complex numbers? If so, then that is itself a complex number. But |z1z2| is a real number, so they can't be equal.
3. (Original post by Pangol)
I think I must be interpreting this wrong. When you say (z1)(z2), do you just mean the product of the complex numbers? If so, then that is itself a complex number. But |z1z2| is a real number, so they can't be equal.
That's what I was thinking I got the modulus to be 6sqrt2 and then the product to be a complex number, maybe I read the question wrong, I'm not sure, I'll ask my teacher, thanks for confirming this haha
4. I think you mean prove |Z1Z2|=(Z1)(Z2).
5. Perhaps the question should be show as that is generally true.
6. Here's the working out.
Here's the working out.
Please could you read the Forum Rules at the top of the Maths Forum. Full solutions are not permitted here. Please just give hints and let people do the work themselves.
8. (Original post by Mr M)
Please could you read the Forum Rules at the top of the Maths Forum. Full solutions are not permitted here. Please just give hints and let people do the work themselves.
Whoops. I'm a newbie here, but I'll remember this in the future.
9. *|z1z2|=|z1||z2|

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