Question

if x+1/x = 4 find x-1/x
plz do the sum in a paper and show me plz ​

Answer 1

Answer:

√12

Explanation:

x+1/x = 4

(x+1/x)^2=16

x^2 + (1/x)^2 +2=16

x^2 + (1/x)^2=14

let's suppose:

x-1/x=y

Then;

(x-1/x)^2=y^2

x^2 + (1/x)^2 -2=y^2

14-2=y^2

12= y^2

√12=y =x-1/x