(x2+1/x2)2+4(x2-1/x2)
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Step-by-step explanation:
(x²+1/x²)2+4(x²-1/x²)
=2x(x+1/x)+4x(x-1/x)
=2x × x + 2x × 1/x + 4x×x - 4x × 1/x
=2x² + 2×1 + 4x² - 4× × 1
=2x²+4x² + 2 - 4
= 6x² - 2
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