a²-3a+1=0,求a-1/a,

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a²-3a+1=0,求a-1/a,a²-3a+1=0,求a-1/a,a²-3a+1=0,求a-1/a,

a²-3a+1=0,求a-1/a,
a²-3a+1=0,求a-1/a,

a²-3a+1=0,求a-1/a,