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    With this question , I tried substituting but I keep getting it wrong,
    1/2 X + 1 = y
    1/2 X + 1 = X2 +4X +3
    0=X2+3.5X+2
    From there i can't factorized from here.

    (This paper from the C12 IAL paper Jan 2016)
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    (Original post by Cake_Chan)
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    With this question , I tried substituting but I keep getting it wrong,
    1/2 X + 1 = y
    1/2 X + 1 = X2 +4X +3
    0=X2+3.5X+2
    From there i can't factorized from here.

    (This paper from the C12 IAL paper Jan 2016)
    Fine so far.

    You'll need to use the quadratic formula - it doesn't have a nice factorization.
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    (Original post by Cake_Chan)
    Name:  Capture.PNG
Views: 47
Size:  90.9 KB
    With this question , I tried substituting but I keep getting it wrong,
    1/2 X + 1 = y
    1/2 X + 1 = X2 +4X +3
    0=X2+3.5X+2
    From there i can't factorized from here.

    (This paper from the C12 IAL paper Jan 2016)
    Not factorisable over the rationals. Use the quadratic formula.
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    Could they ask you to find this area?

    If yes, what would you do after establishing the area of the trapezium?
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    The question is an error, the curve is meant to be x^2 -4x+3, we went over this exact question today in class ;p
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    (Original post by Bigbosshead)
    Could they ask you to find this area?

    If yes, what would you do after establishing the area of the trapezium?
    Area of trapezium - integral of curve for QS - integral of curve for TP
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    What do you mean by integral curve for QS - TP?
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    (Original post by JN17)
    The question is an error, the curve is meant to be x^2 -4x+3, we went over this exact question today in class ;p
    This was my paper. :facepalm:
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    theres nothing wrong with the paper, I did this earlier and got it right. However my method is very long but effective ;D

    Find the area under the line of y=1/2x+1 with the intervals. (Let this be L)
    then find the area under the curve of y+x^2+4x+3 with the intervals P and T
    and then.... find the area under the curve of y=x^2+4x+3 with intervals Q and S and add those together. (Let this be R)

    Finally L-R= ur answer
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    (Original post by Zacken)
    This was my paper. :facepalm:
    I've just checked an online version of the paper and it had it written as -4x, might have been a mistake that was seen after the exam but the question factorizes nicely with it and the area is much simpler.
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    (Original post by JN17)
    I've just checked an online version of the paper and it had it written as -4x, might have been a mistake that was seen after the exam but the question factorizes nicely with it and the area is much simpler.
    I think I remember getting nice values in my exam though. Not sure.
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    (Original post by Zacken)
    I think I remember getting nice values in my exam though. Not sure.
    Did u get an a* in maths


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    (Original post by imran_)
    Did u get an a* in maths


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    Something like 597/600 iirc.
 
 
 
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