Join TSR now and get all your revision questions answeredSign up now

A Level Maths markschemes (AQA) - Do I have to be 'exact'? Watch

    • Thread Starter
    Offline

    3
    ReputationRep:
    If the question is:
    "Expand (x+2)(x+3)(x+4)"

    And my first step is:
    (x+2)(x^2+7x+12)

    But the markscheme awards the first method mark (M1) for:
    (x^2+5x+6)(x+4)

    Would I lose that mark even though I'm right and eventually reach the correct final answer (x^3+9x^2+26x+24)?

    I keep finding myself in similar situations when practicing for my MPC1 paper. Am I right to assume I'd get the mark or would I lose it for not being 'exact'?

    EDIT: I mean not just in the above situation - if I use a different method to the one stated (i.e. factorize things in a different order or collect like terms first) would I lose marks?
    Offline

    3
    ReputationRep:
    (Original post by brokenlevel23)
    If the question is:
    "Expand (x+2)(x+3)(x+4)"

    And my first step is:
    (x+2)(x^2+7x+12)

    But the markscheme awards the first method mark (M1) for:
    (x^2+5x+6)(x+4)

    Would I lose that mark even though I'm right and eventually reach the correct final answer (x^3+9x^2+26x+24)?

    I keep finding myself in similar situations when practicing for my MPC1 paper. Am I right to assume I'd get the mark or would I lose it for not being 'exact'?
    The first mark is for expanding two brackets so I believe you would get the mark.
    Offline

    1
    ReputationRep:
    I highly doubt you would lose a mark, as there is no actual rule that states which factors to multiply first.
    Offline

    3
    ReputationRep:
    If you get the right answer using any valid method and it hasn't stated specifically how to do it, you'll get the marks.
    Offline

    3
    ReputationRep:
    They usually have an abbreviation next to it "OE" which means "or equivalent", your expansion of the other bracket first is equivalent to what they have stated.
 
 
 
Poll
How are you feeling about GCSE Results Day?
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

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