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# Surds rationalising/rearranging question

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1. I'm stuck with the last step of these sorts of questions, where there is a surd divided by another surd. After rationalising and simplifying, I don't know how to get rid of the division line so that the answer is in the form a+b(root)5. Thanks for helping!
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2. (Original post by Sint)
I'm stuck with the last step of these sorts of questions, where there is a surd divided by another surd. After rationalising and simplifying, I don't know how to get rid of the division line so that the answer is in the form a+b(root)5. Thanks for helping!
Your method is correct! Just look over your working and check the numerator. It seems you made a slight slip in expanding the brackets (the simplifying bit).

PS. It is already in the form a+b(root)5! Remember that 'a' and 'b' can be a fraction
3. why do you write your surds like that? Looks like you're trying to use things like the cubed root of 5 instead of 3 root 5.
4. (Original post by Sint)
I'm stuck with the last step of these sorts of questions, where there is a surd divided by another surd. After rationalising and simplifying, I don't know how to get rid of the division line so that the answer is in the form a+b(root)5. Thanks for helping!
As a side note, try to write the numbers in front of your square roots like this:

The second one looks more like the 5th root of 5.
5. (Original post by surina16)
why do you write your surds like that? Looks like you're trying to use things like the cubed root of 5 instead of 3 root 5.
Oh god...

I think I just had a heart attack.
6. also, -7 + 3 = -4
7. (Original post by RDKGames)
Oh god...

I think I just had a heart attack.
what... did I say something stupid?
8. (Original post by surina16)
what... did I say something stupid?
No, I'm agreeing with you.

At least the cat is nice.
9. (Original post by RDKGames)
No, I'm agreeing with you.

At least the cat is nice.
Ah, you had me questioning all my maths skills there for a minute

I agree.
10. Thanks for the help guys!

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