x2+1/x =66find the value of x-1/x
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Answer:
(x−
x
1
)
2
=x
2
+
x
2
1
−2×x×
x
1
=x
2
+
x
2
1
−2
(x−
x
1
)
2
=66−2=64
⇒(x−
x
1
)=8
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