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Byju's Answer
Standard VIII
Mathematics
Expansion of (x+y)^2
X 2+1 / X =38...
Question
X
2
+1/X
2=38,X
3-1/X
3=?
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Solution
x^2 + 1/x^2 = 38
(x - 1/x)^2 + 2 = 38
(x - 1/x)^2 = 38 - 2 = 36
(x - 1/x)^2 = 36
(x - 1/x) = ± 6
so above answer is correct
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