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# Integration watch

1. In the question I had to do . Then later in it told me to suppose we let can someone explain to me how this integral is equivalent to . Thanks.
2. (Original post by JBKProductions)
In the question I had to do . Then later in it told me to suppose we let can someone explain to me how this integral is equivalent to . Thanks.
Note that

Now try expanding the brackets in a way that takes advantage of the distributive property and then attempt to use your substitution.

Spoiler:
Show

Then use your substitution of the left hand integral.

EDIT: I feel as though this is too close to a full solution so I'll spoilerise some of it.
3. (Original post by Farhan.Hanif93)
Note that

Now try expanding the brackets in a way that takes advantage of the distributive property and then attempt to use your substitution.

Spoiler:
Show

Then use your substitution of the left hand integral.

EDIT: I feel as though this is too close to a full solution so I'll spoilerise some of it.
Thanks!

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