1 Answers
x³ + (8/x³)
= x³ + (2/x)³
= {x + (2/x)}³ - 3.x.(2/x)×{x + (2/x)}
= 3³ - 6.3
= 27 - 18
= 9
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Answered
x³ + (8/x³)
= x³ + (2/x)³
= {x + (2/x)}³ - 3.x.(2/x)×{x + (2/x)}
= 3³ - 6.3
= 27 - 18
= 9