answer plzzz
plzzzzzzz
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Answer:
364
Step-by-step explanation:
x - 1/x = 7
=> (x - 1/x)^3 = 343
=> x^3 - 1/x^3 - (3 × x × 1/x(x - 1/x)) = 343
=> x^3 - 1/x^3 - 21 = 343 [x - 1/x =7]
=> x^3 - 1/x^3 = 343 + 21 = 364
Therefore answer is 364
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