You are Here: Home >< Maths

# partial fractions watch

1. how do you split a fraction with a single numerator into partial fractions. Say its

i can make that
but where do i go from there? Am is supposed to make it like

and then use A + B?
2. (Original post by Tagit)
how do you split a fraction with a single numerator into partial fractions. Say its

i can make that

4/(x-3)(x+3). but where do i go from there? Am is supposed to make it like 2/(x-3)(x+3) + 2/(x-3)(x+3)?
You write it as A/(x-3) + B/(x+3) for appropriate numbers A and B.
3. 4/x^2-9 = A/x+3 + B/x-3

thus

4=A(x-3)+B(x+3)

let x=3 and -3 to hence find A and B

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: July 17, 2007
Today on TSR

### Four simple steps to get an A*

Here's all you have to do

### University open days

• University of East Anglia
All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
Wed, 30 Jan '19
• Aston University
Wed, 30 Jan '19
• Solent University
Sat, 2 Feb '19
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