Question

If X - 1/x = 5, Then x^3 - 1/x^3 = ?

Answer 1

hey your ans is here

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given
x-1/x=5

to find
x3-1/x3

now applying identity
(x-1/x)3=x3-1/x3-3(x-1/x)
(5)3=x3-1/x3-3(5)
125+15=x3-1/x3
140=x3-1/x3
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Answer 2

Heya !!!

X- 1/X = 5

( X- 1/X)³ = (5)³

X³ - 1/X³ - 3 ( X - 1/X ) = 125

X³ - 1/X³ - 3 ( 5 ) = 125

X³ - 1/X³ - 15 = 125

X³ - 1/X³ = 125 + 15 = 140

★ HOPE IT WILL HELP YOU ★