Question

If a = 9 - 4√5, then find the value of a - 1\a​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$a= 9-4 \sqrt{5}$

1/a=9+4√5

a-1/a=9-4√5-(9+4√5)

=9-4√5-9-4√5

=-8√5