Question

If x2 + 1/x2 = 51 , find the value (x - 1/x2)

Answer 1

There is lack in your question.The question should be If x2+1/X2=51, Find the value of (x-1/x).
=> X2+1/X2=( x-1/x)^2+2.x.1/x
=>Now putting the value.
=> 51-2=(x-1/x)^2
=>root49=x-1/x
=>7=x-1/x


Hope it helps you....