If x+1/x=10, then find X2+1/X2
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x + 1/x = 10
squaring both sides,
(x+1/x) 2 =( 10 ) 2
x2 + 1/x2 + 2 × x×1/x = 100
x2 + 1/x2 + 2 = 100
x2 + 1/x2 = 100 - 2
x2+ 1/x2 = 98
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