Question

X square + 1 by x square is equal to 2

Answer 1

x^2 + 1/x^2 = 2

X^2 + 1/x^2 - 2 = 0  

by using identity (a^2 -b^2 ) = a^2 + b^2 - 2ab

(x - 1/x )^2 = 0

Answer 2

x^2 + 1/x^2 = 2  X^2 + 1/x^2 - 2 = 0    Identity  (a^2 -b^2 ) = a^2 + b^2 - 2ab  (x - 1/x )^2 = 0