Plz ans me this fast with exp
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7
Step-by-step explanation:
x^2 +1/x^2
= (x + 1x)^2
as x + 1/x = 3
then
(x+1/x)^2 = 3^2
= x^2 + 2x1/x + 1/x^2 = 9
=x^2 + 2 + 1/x^2 = 9
= x^2 + 1/x^2 = 7
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