Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    i don't know why but i dont understand factorising;

    for example: simplify the following:

    3x^2 - 6x

    how do you go about working that out?
    Offline

    10
    ReputationRep:
    3x^2 - 6x

    'Pull out' an x: x(3x - 6)

    There's an x in each term, so you can take it out as a common factor. If you multiply out the bracket, you get what you had before.

    I'm not really good at explaining stuff, but I hope that helps a bit.
    Offline

    1
    ReputationRep:
    could also be:

    3x(x-2)
    • Thread Starter
    Offline

    0
    ReputationRep:
    that helps but i also got some additional help from my friend who says you should simplify that out like this. So:

    3x^2 - 6x

    would be;

    3x(x - 2)

    But yours would still be correct? - i dont get that part.
    • Thread Starter
    Offline

    0
    ReputationRep:
    Me2 beat me to it hehe

    so both: 3x(x - 2) and x(3x - 6) would be correct?
    Offline

    10
    ReputationRep:
    (Original post by siliviax)
    Me2 beat me to it hehe

    so both: 3x(x - 2) and x(3x - 6) would be correct?
    Yes, both are right. I evidently missed the factor of 3 .
    Offline

    15
    ReputationRep:
    (Original post by siliviax)
    Me2 beat me to it hehe

    so both: 3x(x - 2) and x(3x - 6) would be correct?
    in a way, but factorising is usually seen (by myself anyway) as taking all of the factors outside the brackets
    • Thread Starter
    Offline

    0
    ReputationRep:
    Thanks for your help
    Offline

    0
    ReputationRep:
    (Original post by siliviax)
    Me2 beat me to it hehe

    so both: 3x(x - 2) and x(3x - 6) would be correct?
    3x(x-2) would be the best answer.
 
 
 
Turn on thread page Beta
Updated: March 6, 2004
Do you think parents should charge rent?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

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

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.