Some one plzzzz solve this

So answer is 280

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(x+1/x)^3= x^3-1/x^3-3(x-1/x), OR 5^3=x^3-1/x^3-3*5 (as x-1/x=5 given) So, x^3-1/x^3= 125+15= 140, so 2x^3-2/x^3= 280
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Factorisation

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What are you looking for?