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

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    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?
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    (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.
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    I highly doubt you would lose a mark, as there is no actual rule that states which factors to multiply first.
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    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.
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    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.
 
 
 
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