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# A-Level Maths [Help] - Surds Watch

1. So i had this question
Show that

I done the first bit - expanding
Which leaves me with

I know the answer etc. as it saids it in the question, I just don't undertstand how you divide by a square root
2. bump - fixed formats
3. Think about what root x would be if you wrote it as x to a power
Then actually try to divide each term of the numerator by this and see what you get - use power laws
Show that

I done the first bit - expanding
Which leaves me with

I know the answer etc. as it saids it in the question, I just don't undertstand how you divide by a square root
Divide each term by and remember that also

Also f(x) cannot be in that form unless it is
5. can be written as: . See if that helps you.

If you need some extra help with figuring out A:
Spoiler:
Show
6. (Original post by RDKGames)
Divide each term by and remember that also
Yh thanks, i understand what you said. So okay it saids the answer to:

So like it is
or is that basically saying 9/a so would it be
If that isn't correct then I still don't get it
7. (Original post by BobBobson)
can be written as: . See if that helps you.

If you need some extra help with figuring out A:
Spoiler:
Show
Thanks, (@ spoiler) I should know this but I still can't figure out why that is the case

Edit: Ohh i think i understand now, it is basically like saying right?
8. And then its like saying is the same as root x divided by root x which is 1? so it would just be 24
Yh thanks, i understand what you said. So okay it saids the answer to:

So like it is
or is that basically saying 9/a so would it be
If that isn't correct then I still don't get it
That's correct.
10. (Original post by RDKGames)
That's correct.
Okay, thanks.. again

And thank you to everyone above aswell
Show that

I done the first bit - expanding
Which leaves me with

I know the answer etc. as it saids it in the question, I just don't undertstand how you divide by a square root
You've got the answer but in the wrong format, remember root(x) = x^1/2

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