Question

ans this simple q with full steps

Answer 1

Heya !
Your answer is in the pic.

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Answer 2

(x+1/x)^2=x^2+1/x^2+2(x)(1/x)
(x+1/x)^2= 7+2 =9
(x+1/x)=3
(x+1/x)^3=x^3+1/x^3+3(x)(1/x)(x+1/x)
(3)^3=x^3+1/x^3 +3(3)
27-9=x^3+1/x^3
18 =x^3+1/x^3

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