If x^2+1/x^2 = 66, find the value of x-1/x .please solution this question.
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given x^2 + 1/x^2 = 66...........2
to evaluate x - 1/x
step 1 square x-1/x
=> (x-1/x)^2 = x^2 + 1/x^2 + 2*x*1/x
= 66 + 2
= 68 [ from 1 ]
therefore x - 1/x = √68 or 2√17
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