Question

plz answer it fast with explanation ​

Answer 1

Answer:

• (x-1/x)^2 = x^2 + 1/ x^2 - 2.x.1/x

(x-1/x)^2 = 15-2

(x-1/x) = root 13

• (x-1/x)^3 = x^3 - 1/x^3 - 3 (x.1/x)(x-1/x)

(root 13)^3 = x^3 - 1/x^3 -3 (root 13)

x^3 - 1/x^3 = (root 13)^3 - 3 root 13

x^3 - 1/x^3 = 13 root 13 - 3 root 13

x^3 - 1/x^3 = 10 root 13