Question

If x2+1/x2=18 what is the value f x=1/x

Answer 1

Step-by-step explanation:

x²+1/x²=18

(x+1x)²-2x.1/x=18

(x+1/x)²-2=18

(x+1/x)²=20

x+1/x=√20=2√5