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    Hia,

    I'm struggling with question 4 which I have posted below.
    I know there's a hint with it and I think I have used that.

    I have attached my current workings, but cant see how I go from what I've done to the result I need.

    Any help would be greatly appreciated.

    Thank you
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    (Original post by Roxanne18)
    Hia,

    I'm struggling with question 4 which I have posted below.
    I know there's a hint with it and I think I have used that.

    I have attached my current workings, but cant see how I go from what I've done to the result I need.

    Any help would be greatly appreciated.

    Thank you
    The algebra looks a bit messy, and I've not worked it through myself.

    I think there is some mileage, in taking the original equation for the circle and squaring it. And use the fact that |z|^2=z\bar{z}, to get rid of the modulus signs. And multiply through by (k^2-1)^2 to get rid of the fractions.

    It's also worth converting the equation you're aiming for into the same form, so it's clear what you're trying to achieve.

    As I said, not worked it through, so this may be a red herring, but it looks promising.
 
 
 
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