Question

If x^2+(1/x^2)=27then find the value of x-(1/x) =?
A) 1
B)2
C)3
D)4
E) 5​

Answer 1

Answer:

ans is 5

x^2+1/x^2=27

subtracting 2 from both sides we get

(x^2-1/x^2)^2=25

so

x-1/x = 5