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    I was doing the january 2006 past paper

    and i was stuck on question 9a,

    also for 10a, im not sure how b is 2 and not 4

    Also for question 7d im not how to factorise such large numbers??
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    (Original post by Yousf)
    I was doing the january 2006 past paper

    and i was stuck on question 9a,

    also for 10a, im not sure how b in 2 and not 4

    Also for question 7d im not how to factorise such large numbers??
    Which exam board?
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    (Original post by usycool1)
    Which exam board?

    edexcel
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    (Original post by Yousf)
    edexcel
    Ok:

    i was stuck on question 9a,
    The equation of the graph is y = (x - 1)(x^2 - 4)

    You need to find where it hits the x-axis. That will happen when y = 0 so see if you can work out when that will happen.

    also for 10a, im not sure how b in 2 and not 4
    Well, what makes you think it's 4?

    Also for question 7d im not how to factorise such large numbers??
    Simplify it a little bit before you attempt to factorise. Post where you got up to if you're not sure how to and I'll show you.
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    (Original post by usycool1)
    Ok:



    The equation of the graph is y = (x - 1)(x^2 - 4)

    You need to find where it hits the x-axis. That will happen when y = 0 so see if you can work out when that will happen.

    I did this but im clueless the markscheme says p is 2 and q is -2


    Well, what makes you think it's 4?

    Dont we have to half the coeffecient on 2x which gives us 1, then we square which give us -1, to get 3 we need to add 4?


    Simplify it a little bit before you attempt to factorise. Post where you got up to if you're not sure how to and I'll show you.
    n^2+4n-320=0
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    (Original post by Yousf)
    n^2+4n-320=0
    Well, you've simplified it as much as you can. There isn't really any good method I can think of apart from just thinking of numbers that would work (it won't be too bad, they won't give anything too hard in C1).
 
 
 
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