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# Rationalizing denominators watch

1. I am trying to rationalise the following fraction:
1/(a+b∛7+c(∛7)^2 )

but I cannot seem to be able to get anywhere.
Thank you in advance for any help.
2. (Original post by mollyjordansmith)
I am trying to rationalise the following fraction:
1/(a+b∛7+c(∛7)^2 )

but I cannot seem to be able to get anywhere.
Thank you in advance for any help.
Is this to do with the same subfield question...?
3. (Original post by RDKGames)
Is this to do with the same subfield question...?
Yes it is
4. (Original post by mollyjordansmith)
I am trying to rationalise the following fraction:
1/(a+b∛7+c(∛7)^2 )

but I cannot seem to be able to get anywhere.
Thank you in advance for any help.
(Original post by RDKGames)
Is this to do with the same subfield question...?
Would seem so. I really do think the OP would be better off using the suggestion I posted there:
5. (Original post by DFranklin)
Would seem so. I really do think the OP would be better off using the suggestion I posted there:
I understand what you put in the other post however I think I need to
find the inverse rather than just show there is one.
6. (Original post by mollyjordansmith)
I understand what you put in the other post however I think I need to
find the inverse rather than just show there is one.
Not to prove it's a subfield, you don't.
7. (Original post by DFranklin)
Not to prove it's a subfield, you don't.
Okay thank you

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