Question

(x-1/x)²=x²+1/x²-2 and -1/5=5,then find the value of x²+1/x²-2
​

Answer 1

Answer:

We need to find X2+ 1 / x2

( x + 1 / x )2 = 25

= x2 + 1 / x2 + 2 (x)(1)(1/x) =25

= x2 + 1/x2 + 2 = 25

= X2 + 1 / x2 = 25 – 2

= X2+ 1 / x2=23