You are Here: Home >< Maths

# Maths - quadratic fraction simplification help! watch

1. Simplify the fraction - (x2+3x-10) / (x2-2x)

This is OCR Maths Unit C GCSE if that's at all relevant. We;ve only learnt cross division - multiplication?

Do I need to factorise the quadratic? - If so, I got - (x+5) (x-2) - but i don't know where to go from there...

Any help would be greatly appreciated. Sorry if the question isn't written clearly.
2. So you've simplified the top, and can't do anything else there. Where else can you simplify?
3. Factorise the denominator.
4. The question is worth 4 marks - I don't understand?!
5. The bottom. Factorise that also and then cancel.
6. I cant find the two number combinations though - (x-1)2 - expands out to give -1? (x-1) (x+1) gives -1? I've tried others also and can't find the factorised solution :-(
7. Oh.... is it just x(x-2) ? Sorry I'm so stupid.
8. If it cancels to (x+5)/x - does it then cancel further to just 5?
9. (Original post by Raza098)
If it cancels to (x+5)/x - does it then cancel further to just 5?
No. That is right.
10. (Original post by Raza098)
If it cancels to (x+5)/x - does it then cancel further to just 5?
No. You can probably leave it like that and get the marks, but if you want to cancel further then you have to remember that it is (x+5) all divided by x. Maybe separate it into different terms to see how you can do this?
11. (Original post by Hormonal)
No. That is right.
As in leave it as (x-5)/x?

How come when I sub values in it comes to 0 though?
12. Oh - is it just coz I used 2? - when I did x=3 it seemed to work . Thank you! I'm supposed to be in a maths comp. on Thursday too - sounds promising ...
13. (Original post by Raza098)
As in leave it as (x-5)/x?

How come when I sub values in it comes to 0 though?

(Original post by Raza098)
Oh - is it just coz I used 2? - when I did x=3 it seemed to work . Thank you! I'm supposed to be in a maths comp. on Thursday too - sounds promising ...
The only time it will equal 0 is when x=5.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: March 5, 2013
Today on TSR

### The most controversial member on TSR?

Who do you think it is...

### Uni strikes! How do they affect you?

Discussions on TSR

• Latest
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE