Question

Please help me....
Best answer I wil mark as brainiest​

Answer 1

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Answer 2

Answer:

a³-b³=(a−b)³ +3ab(a−b)

Here,

a=x

b= 1/x

Substitute these values in the above equation.

x³-1/x³ =(x-1/x )³ +3(x− 1/x )

=(3)³ +3(3)

=27+9

=36

Hence, the required answer is 36.

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