Question

if (x^2+1/x^2)=102,the value of (x-1/x)is what

Answer 1

x²+1/x² =102


Subtract 2(x*1/x) from both sides,

[2*x*1/x] =2

Now,

x²+1/x² -2 =102-2

By formula (a-b)²=a²+b²-2ab

(x-1/x)² =100

x-1/x =√100

x-1/x =10


I hope this will help

-by ABHAY