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Xsqaure+1/xsquare=8, find x4+1/x4=?

Answer» x2+1/x2 = 8 then x4+1/x4=? on squaring both side(x2+1/x2)2 = 82x4+1/x4+2 = 64x4+1/x4 = 64-2 = 62


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