Give in form a+b√2

(3-√8)²

9-3√8-3√8+4

13-6√8

13-12√2

book says i'm wrong can't understand why (Worried)

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- October 15th 2009, 01:24 PMalibond07Easy Surd, frustrated...
Give in form a+b√2

(3-√8)²

9-3√8-3√8+4

13-6√8

13-12√2

book says i'm wrong can't understand why (Worried)

- October 15th 2009, 01:27 PMe^(i*pi)
- October 15th 2009, 01:31 PMalibond07
Thanks got it now, just made a careless mistake with the -√8x-√8.