You are Here: Home >< Maths

# Binomial expansion Watch

1. got a question that's bugging me x100

it's 2b)

i'd appreciate any help
2. Expand both the brackets
collect like terms
factorise
3. Expand the (1+x)^4 then think what differences (1-x)^4 would have
4. (Original post by nitrogenousBase)

got a question that's bugging me x100

it's 2b)

i'd appreciate any help
You can save yourself a lot of work by using 2a.

So what is the link between the expansiom of (1+x) and (1-x), without calculating it like in 2a?
5. (Original post by SeanFM)
You can save yourself a lot of work by using 2a.

So what is the link between the expansiom of (1+x) and (1-x), without calculating it like in 2a?
Is it not essentially the same expansion except with certain terms of negative value?
6. (Original post by nitrogenousBase)

got a question that's bugging me x100

it's 2b)

i'd appreciate any help
(Original post by SeanFM)
You can save yourself a lot of work by using 2a.

So what is the link between the expansiom of (1+x) and (1-x), without calculating it like in 2a?
Difference of two squares cleans it up pretty quickly.
7. (Original post by nitrogenousBase)
Is it not essentially the same expansion except with certain terms of negative value?
Indeed!

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: September 21, 2016
Today on TSR

### 'Entry requirements are a form of elitism'

What do you think?

### I fancy Donald Trump...

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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