If x - 9-4-5- find x2 -1-x2 and x3 -1-x3

x=9 4√(5) 1x=9+4√(5)(9 4√(5))(9+4√(5))=9+4√(5) x 1x= 8√(5) x+ 1x=18 Now, x^2 1x^2=(x 1x)(x+ 1x)= 144√(5) and x^3 1x^3=(x 1x)(x^2+ ...

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Rationalisation

If x = 9-4√...

Question

If $x = 9 - 4 \sqrt{5}$ , find $x^{2} - \frac{1}{x^{2}}$ and $x^{3} - \frac{1}{x^{3}}$

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