# What is #int1/(x^2-5)#?

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When I use an online integral calculator, it's suggesting I use substitution and let #u=x/sqrt(5)#

I don't understand how to get the #sqrt(5)# . Is there an alternative way of solving this?

If not - what does the #sqrt(5)# mean and how do I work this out for similar questions?

When I use an online integral calculator, it's suggesting I use substitution and let

I don't understand how to get the

If not - what does the

##### 2 Answers

#### Explanation:

Now if we set

It is now all set for substitution:

Undo substitution:

Absolute value for the domain.

I use to solve this way: