X+1/x=5 then find the value of x-1/x
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x+1/x=5
(x+1/x)^2=(5)^2
x^2+2+1/x^2=25
x^2+1/x^2=23
(x-1/x)^2=x^2-2+1/x^2
(x-1/x)^2=23-2
(x-1/x)^2=21
x-1/x=root 21
(x+1/x)^2=(5)^2
x^2+2+1/x^2=25
x^2+1/x^2=23
(x-1/x)^2=x^2-2+1/x^2
(x-1/x)^2=23-2
(x-1/x)^2=21
x-1/x=root 21
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