Question

if x-1/x = 5 find the value of x3-1/x3
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Answer 1

Step-by-step explanation:

hope u will understand

Answer 2

x - 1/x = 5

cubing both sides

( x- 1/x )³ = 5³

x³ - 1/x³ - 3(x -1/x) = 125

x³ - 1/x³ -3×5 =125

x³ - 1/x³ -15 = 125

x³ - 1/x³ =140