if x=4-√15 find (x+1uponx)2
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x=4-√15
1/x=1/(4-√15)
=(4+√15)/(4-√15)(4+√15)
=(4-√15)/(4^2-√15^2)
=(4-√15)/(16-15)
=4-√15
(x+1/x)^2
=(4-√15+4+√15)^2
=8^2
=64
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answer is 64 if it is (x+1/x)^2
and if it is 2(x+1/x) then answer is 16
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