Question

Pls help me i is bary bary bad at math ​

Answer 1

Answer:

x+1/x = H

(x +1/x)^2 - 2(x+1/x)=x^2 + 1/x^2

H^2 - H = x^2 + 1/x^2

H(H-1)=x^2 + 1/x^2