Question

if x=√3+√5 then x^3+1/x^3​

Answer 1

Answer:

hey your ans is here

both the answer is of your question you can choose any of it

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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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or

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 ★