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# FP2

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1. http://mathsathawthorn.pbworks.com/w...555631/FP2.pdf
6b?
So ive done part a and ive started b)
So far ive expanded the bracket to get z^3-3z +3/z -1/z^3
I put that into 2 brackets to get (z^3-1/z^3) -3(z-1/z)
Now what do i do next?
2. (Original post by Ayaz789)
http://mathsathawthorn.pbworks.com/w...555631/FP2.pdf
6b?
So ive done part a and ive started b)
So far ive expanded the bracket to get z^3-3z +3/z -1/z^3
I put that into 2 brackets to get (z^3-1/z^3) -3(z-1/z)
Now what do i do next?
You've rearranged it correctly.. now use more 'definitions' that you know.
3. (Original post by Ayaz789)
http://mathsathawthorn.pbworks.com/w...555631/FP2.pdf
6b?
So ive done part a and ive started b)
So far ive expanded the bracket to get z^3-3z +3/z -1/z^3
I put that into 2 brackets to get (z^3-1/z^3) -3(z-1/z)
Now what do i do next?
Hopefully you've spent a while trying different things to solve this problem before asking.

Anyway there's a reason they got you to do what you did in the first part.
4. (Original post by IrrationalRoot)
Hopefully you've spent a while trying different things to solve this problem before asking.

Anyway there's a reason they got you to do what you did in the first part.
Ohh soo all of that equals (2isintheta)^3
5. (Original post by SeanFM)
You've rearranged it correctly.. now use more 'definitions' that you know.
Okay so i replace the first bracket with 2isin3theta right? Then i replace the second bracket with? Give me 2 mins , ill try working it out
6. (Original post by IrrationalRoot)
Hopefully you've spent a while trying different things to solve this problem before asking.

Anyway there's a reason they got you to do what you did in the first part.
Okay so ive got 2isin3theta -6isintheta , so a is 2 and b is -6?
7. http://mathsathawthorn.pbworks.com/w...555631/FP2.pdf
For 7d? Ive worked out the values for x as being -1 & 2 , what do i with them next?

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