Question

if x+1/x=4then X2+1/X2 is equal to​

Answer 1

x+1/x = 4

=> (x + 1/x)^2 = 4^2

=> x^2 + 2.x.1/x + 1/x^2 = 16

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

=> (x^2 + 1/x^2) = (14)