Question

Find the value of x-1/x,if x2+1/x2 =23 who will give me satisfied answer, I will mark the person branlist and also follow him/her​

Answer 1

Answer:

Given:

x2+1/x2 =23

find:

x-1/x=?

let,

x-1/x= y

squaring on both sides

=>(x-1/x)²= y²

=>x²+1/x²-2=y²

=>y²=23-2.......as the value of x²+1/x² is 23

= y²=21

=>y=+-√21

therefore,x-1/x = +-√21

HOPE IT HELPS !!