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# Difficult surds question (help)

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1. Hi!

As part of my homework, I have been set the following question:

'You are given that is not 0, and that . Now suppose that .

(a) Show that .
(b) Deduce that , and hence that either or .
(c) What can you deduce about and ?'

I've done the first two parts, but I'm not sure what to write for part (c).

While writing this, I've noticed that is not possible, because earlier in the question it states that . Hence I assume the answer must be to say that must be 0, but I may be missing something? Is that really all I have to write?
2. (Original post by K-Man_PhysCheM)
Hi!

As part of my homework, I have been set the following question:
'You are given that is not 0, and that . Now suppose that .

(a) Show that .
(b) Deduce that , and hence that either or .
(c) What can you deduce about and ?'

I've done the first two parts, but I'm not sure what to write for part (c).

While writing this, I've noticed that is not possible, because earlier in the question it states that . Hence I assume the answer must be to say that must be 0, but I may be missing something? Is that really all I have to write?
You're also given that y is not 0.
3. (Original post by B_9710)
You're also given that y is not 0.
Oh yeah... OK, so I just say that the supposed is false/impossible? Thank you!
4. (Original post by K-Man_PhysCheM)
Oh yeah... OK, so I just say that the supposed is false/impossible? Thank you!
Both solutions are not possible therefore
5. (Original post by RDKGames)
Both solutions are not possible therefore
Ok, thank you!

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