Question

solve this question with explanation​

Answer 1

Answer:

18

Step-by-step explanation:

(x - 1/x) = 4

Squarring both sides,

(x - 1/x)^2 = 4^2

x^2 + (1/x^2) - 2(x)(1/x) = 16

x^2 + (1/x^2) -2 = 16

x^2 + (1/x^2) = 16 + 2

x^2 + (1/x^2) = 18