Question

(x+1/x)=3 the value of (x²+1/x²)

Answer 1

( x + 1 / x ) = 3

Squaring both sides,

( x + 1 / x ) ^ 2 = 3 ^ 2

x ^ 2 + 1 / x ^ 2 + 2 * x * 1 /x = 9

x ^ 2 + 1 / x ^ 2 + 2 = 9

x ^ 2 + 1 / x ^ 2 = 9 -2 

x ^ 2 + 1 / x ^ 2 = 7.