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x4 - x2 + 1 = 0 Or, x2 + 1/x2 = 1 Or, x + 1/x = √3 Now, x3 + 1/ x3 = ( x + 1/x)3 - 3.x.1/x.( x + 1/x) = 3√3 - 3√3 = 0
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x4 - x2 + 1 = 0 Or, x2 + 1/x2 = 1 Or, x + 1/x = √3 Now, x3 + 1/ x3 = ( x + 1/x)3 - 3.x.1/x.( x + 1/x) = 3√3 - 3√3 = 0