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If a^(2)- 5a-1= 0 and a ne 0, find : a^(...

If `a^(2)- 5a-1= 0 and a ne 0`, find : `a^(2)- (1)/(a^(2))`

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The correct Answer is:
`(i) 5 ` `(ii) +-sqrt(29)` `(iii) +-5sqrt(29)`
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