Question

Tell me answer of (ii) number

Answer 1

(x+1/x)²=x²+1/x²+2
(x+1/x)²=23+2=25
x+1/x=5
so 5 is the answer

Answer 2

(x+1/x)^2=x^2+1^2/x^2+2×x×1÷x
=x^2+1/x^2+2
=23+2 (substituting valie of x+1÷x^2)
(x+1/x)^2=25
x+1/x=25^1/2
x+1/x=5