Question

Answer for the second question please. Answer with explanation

Answer 1

X+1/x=2
cubing both side,
X3+1/x3+3x.1/x(x+1/x)=8
X3+1/X3+3(X2+1/x)=8
X3+1/3+3×2=8
=X3+1/X3=2

Answer 2

x+1/x= 2 now cubing the equation both side