if x equals two root five plus two then the value of x minus one by x is
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1/2
bcoz
substitute x in x-1/x
then 2
2√5+2-1/2√5+2
2√5+1/2√5+2
1/2
bcoz
substitute x in x-1/x
then 2
2√5+2-1/2√5+2
2√5+1/2√5+2
1/2
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