FP1 Edexcel Chapter 1 Watch

Disregarded7017
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What does this mean, I saw it on the specification.
'Geometrical representation of sums, products and quotients of complex numbers.'
I know that complex numbers add together to form a parallelogram but is there something you can also form when you multiply or divide complex numbers?
Thanks for any helps!!
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Protostar
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(Original post by puta.madre)
What does this mean, I saw it on the specification.
'Geometrical representation of sums, products and quotients of complex numbers.'
I know that complex numbers add together to form a parallelogram but is there something you can also form when you multiply or divide complex numbers?
Thanks for any helps!!
Well when you multiply two complex numbers together you get another complex number, same for dividing them.

I imagine the specification is referring to Argand diagrams when it says this?

As then you can plot the new complex numbers on one of those
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Notnek
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(Original post by puta.madre)
What does this mean, I saw it on the specification.
'Geometrical representation of sums, products and quotients of complex numbers.'
I know that complex numbers add together to form a parallelogram but is there something you can also form when you multiply or divide complex numbers?
Thanks for any helps!!
You need to know about the modulus/argument of a product and quotient

For a product: |zw| = |z| |w|

and

arg(zw) = arg(z) + arg(w).
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Notnek
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(Original post by puta.madre)
What does this mean, I saw it on the specification.
'Geometrical representation of sums, products and quotients of complex numbers.'
I know that complex numbers add together to form a parallelogram but is there something you can also form when you multiply or divide complex numbers?
Thanks for any helps!!
Sorry ignore what I said above - I'm getting mixed up between exam boards. For Edexcel FP1 you don't need to know the arg(zw) result but you do need to know that |zw|=|z||w|.
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