plzz answer this question
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given x² +1/x² =18
x²+1/x² -2*x*1/x = 18 -2*x*1/x
(x-1/x)² = 18-2
(x-1/x)² = 16
(x-1/x) = 4 or - 4
option 4) is correct
avnikaur399:
thanks
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