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    Very Important Poster
    Which question is it? Please post your working
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    Which exam board is this???
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    (Original post by SeanFM)
    Which question is it? Please post your working
    6 mainly and I've done non I don't get it lol


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    (Original post by SargentZenj2)
    Which exam board is this???
    Aqa how come


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    [QUOTE=lkjhgfdsasd;60325977]Aqa how come


    Edexcel. Its because the C1 for you is C2 for us and we dont do circle equations and such this c2
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    [QUOTE=lkjhgfdsasd;60325949]6 mainly and I've done non I don't get it lol

    for 6ai
    Let F(x) = x^3 + x^2 -10x +8
    So F(2) = 2^3 + 2^2 -(10x2) +8 =
    Therefore X-2 is a factor of X^3 + x^2 -10x +8

    For 6aii
    Use long division and youll find
    X^3 +X^2 -10X + 8 = (X-2)(X^2+3X-4)

    Then factorise X^2 +3x - 4 = (X-1)(X+4)
    so therfore
    X^3 +X^2 -10X + 8= (x-2)(x-1)(x+4) <= those are the factors.

    For 6b a>0 so its a normal cubic curve
    the x intercepts when y=0 are (2,0)(1,0)(-4,0)
    When x=0 the y intercept is (0,8)
    Since this is a sketch just plot these points only, you dont need to work out anything else. It should be a rough drawing
    . Sorry this took so long
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    [QUOTE=SargentZenj2;60326277]
    (Original post by lkjhgfdsasd)
    6 mainly and I've done non I don't get it lol

    for 6ai
    Let F(x) = x^3 + x^2 -10x +8
    So F(2) = 2^3 + 2^2 -(10x2) +8 =
    Therefore X-2 is a factor of X^3 + x^2 -10x +8

    For 6aii
    Use long division and youll find
    X^3 +X^2 -10X + 8 = (X-2)(X^2+3X-4)

    Then factorise X^2 +3x - 4 = (X-1)(X+4)
    so therfore
    X^3 +X^2 -10X + 8= (x-2)(x-1)(x+4) <= those are the factors.

    For 6b a>0 so its a normal cubic curve
    the x intercepts when y=0 are (2,0)(1,0)(-4,0)
    When x=0 the y intercept is (0,8)
    Since this is a sketch just plot these points only, you dont need to work out anything else. It should be a rough drawing
    . Sorry this took so long
    Thanksss I'm going to check this out properly in a bit after I've done the first two questions and you were fast tho


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    [QUOTE=SargentZenj2;60326061]
    (Original post by lkjhgfdsasd)
    Aqa how come


    Edexcel. Its because the C1 for you is C2 for us and we dont do circle equations and such this c2
    Ohh right


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