Question

If x = 9 + 4√5 , find the value of √x -1/√x

Answer 1

Answer:

Hope this answer will help u

Step-by-step explanation:

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Answer 2

Answer:

4

Step-by-step explanation:

9 + 4√5 = (2)^2 + (√5)^2 + 2*2*√5

=(2 + √5)^2

so √x =√5 + 2

and by rationalisation 1/√x = √5 - 2

So

√x - 1/√x = √5 + 2 -( √5 -2 )

=4

Hope it helps