Answers

2014-04-24T17:34:13+05:30
X+1/x=8
1/x=1(4-√15)=4+√15/(16-15)=4+√15
x+1/x=4-√15+4+√15=8
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2014-04-24T22:14:16+05:30
X+1/x=(4-15^1/2)+(1/4-15^1/2)
rationalising denominator in second term,we get self in term as (4+15^1/2)/16-15=4+15^1/2
therefore,
x+1/x=(4-15^1/2)+(4+15^1/2)
         =4+4=8
x+1/x=8
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