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Algebraic Fractions

I have this question

x9x24y2y3x2y\frac{x}{9x^2-4y^2} - \frac{y}{3x-2y}

Here is my working out.

x(3x+2y)(3x2y)y(3x2y)\frac{x}{(3x+2y)(3x-2y)} - \frac{y}{(3x-2y)}

xy(3x+2y)(3x+2y)(3x2y)\frac{x-y(3x+2y)}{(3x+2y)(3x-2y)}

However when I expand it etc.

I don't get the answer that is on the markscheme
Reply 1
Original post by ColdKant
what is the answer on the markscheme?


x13xy2y2(3x+2y)(3x2y)\frac{x13xy-2y^2}{(3x+2y)(3x-2y)}
Reply 2
Original post by zed963
x13xy2y2(3x+2y)(3x2y)\frac{x13xy-2y^2}{(3x+2y)(3x-2y)}


That's a weird answer, where's it from?
(edited 11 years ago)
Reply 3
Original post by ColdKant
That's a weird answer, where's it from?


What do you think the answer is and is my working out correct


The answer is from a mark scheme of Edexcel GCSE 5MB2H

Its on this document

MarkScheme(H)SetB.doc

Question 15
Reply 4
Seems like you did it right.. Can't see where the 13 comes from, must be a typo (typed 1 instead of -).
Reply 5
Original post by Karaiyar
Seems like you did it right.. Can't see where the 13 comes from, must be a typo (typed 1 instead of -).


I agree, can't get a 13 from anywhere
Reply 6
I hate mark scheme errors argggh
Reply 7
Original post by zed963
.

You seem to be a lot better at algebraic fractions than you were a month ago.

Practice makes perfect :smile:

When's your GCSE exam?
Reply 8
Original post by notnek
You seem to be a lot better at algebraic fractions than you were a month ago.

Practice makes perfect :smile:

When's your GCSE exam?


13 June

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