Question

find x³+1/x³ if x+1/x=3
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Answer 1

Answer:

hope this will help....

Answer 2

Answer:

x+1/x=3[Given]

Cubing both sides.,

(x+1/x)³=(3)³

(x)³+(1/x)³+3×x×1/x(x+1/x)=27

x³+1/x³+3×3=27[x+1/x=3]

x³+1/x³+9=27

x³+1/x³=27-9

x³+1/x³=18