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# Further maths- manipulating expressions involving alpha and beta watch

1. Hi guys, I dont get this at all! Can someone explain the method on manipulating in laymans terms please?
Question: write each of the following expressions in terms of alpha+beta and alphabeta
a)

2/alpha + 2/beta

b)
1/alpha^2beta + 1/beta^2 alpha

Thanks!
2. Put the fractions over a common denominator.
3. (Original post by Unbounded)
Put the fractions over a common denominator.
I know that bit, but I dont get what happens to the numerator..
4. (Original post by lionking)
I know that bit, but I dont get what happens to the numerator..
times 2/alpha by beta/beta and 2/beta by alpha/alpha...

come on this is pre-gcse maths
5. (Original post by didgeridoo12uk)
times 2/alpha by beta/beta and 2/beta by alpha/alpha...

come on this is pre-gcse maths
Lol i get that! Im talking about manipulation of alpha and beta -.-.

Sorry if Im not being clear enough, I thought i was.
6. (Original post by lionking)
Lol i get that! Im talking about manipulation of alpha and beta -.-.

Sorry if Im not being clear enough, I thought i was.
well write out what you have so far

use if you can, it makes it soo much easier to read

for example

and other such ridiculous equations would be illegible written otherwise
7. Ok this is the original question:

+

This is what I get after cross multiplying:

After that I dont know what to do lol.

For the second question. Original question:

+
8. Yes, so, multiply the first fraction by and the 2nd fraction by .

What do you get?
9. (Original post by lionking)
Ok this is the original question:

+

This is what I get after cross multiplying:

After that I dont know what to do lol.

For the second question. Original question:

+
1) Factorise one number out and you are home.

2) Common denominator of (alpha beta)^2 perhaps?

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