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|1 − zw*|^2 − |z − w|^2 = (1 − |z|^2)(1 − |w|^2)
where z and w are complex numbers and z* is the conjugate of z.
Not very fluent with algebraic properties of these things so please help!!
Thanks.
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Video solution here: https://www.youtube.com/watch?v=mFfBIZ33Us4
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