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If a = 9-4√5 find the value of a - 1/a

If a = 9-4√5 find the value of a - 1/a-example-1

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If a = 9-4√5 find the value of a - 1/a-example-1
User Astraport
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5 votes
The solution is attached
the answer is -8√5
If a = 9-4√5 find the value of a - 1/a-example-1
User MarekR
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