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Math Help - Quadratics Help please!!

  1. #1
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    Quadratics Help please!!

    I have tried my best to solve these, working answers that are posted would be appreciated!! I want to see where im going wrong, if you could post your work it would be awesome.


    1) -1/25d(d-40)

    - What are the d intercepts?
    - Find the vertex
    - Write the function in standard form

    2) h= -3/144(d-96)(d+96)

    - What are the d intercepts?
    - Find the vertex
    - Write the function in standard form

    3) y= 1/10x^2-2x

    - What are the x intercepts
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  2. #2
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    Re: Quadratics Help please!!

    Quote Originally Posted by Frostx View Post
    I have tried my best to solve these, working answers that are posted would be appreciated!! I want to see where im going wrong, if you could post your work it would be awesome.


    1) -1/25d(d-40)

    - What are the d intercepts?
    - Find the vertex
    - Write the function in standard form

    2) h= -3/144(d-96)(d+96)

    - What are the d intercepts?
    - Find the vertex
    - Write the function in standard form

    3) y= 1/10x^2-2x

    - What are the x intercepts
    why don't you post what you have done with each of these?
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  3. #3
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    Re: Quadratics Help please!!

    1) -1/25d(d-40)

    - What are the d intercepts?
    0 or 40
    - Find the vertex
    40/2 =20
    D=20
    h=-1/25d(d-40)
    =-1/25(20)(20-40)
    =-0.8(-20)
    =16
    VERTEX= (20,16)
    - Write the function in standard form

    2) h= -3/144(d-96)(d+96)

    - What are the d intercepts?
    - Find the vertex
    - Write the function in standard form

    3) y= 1/10x^2-2x

    - What are the x intercepts

    .................................................. .......

    Thats as far as i got :C
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  4. #4
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    Re: Quadratics Help please!!

    Quote Originally Posted by Frostx View Post
    1) -1/25d(d-40)

    - What are the d intercepts?
    d = 0 or d = 40 ok
    - Find the vertex
    40/2 =20
    D=20
    h=-1/25d(d-40)
    =-1/25(20)(20-40)
    =-0.8(-20)
    =16
    VERTEX= (20,16) ... ok
    - Write the function in standard form

    y = -1/25(d-20)^2 + 16

    2) h= -3/144(d-96)(d+96)

    - What are the d intercepts? how about d = 96 and d = -96 ? why?
    - Find the vertex ... midway between the intercepts, right?
    - Write the function in standard form

    3) y= 1/10x^2-2x

    y = (1/10) x(x - 20)

    - What are the x intercepts find them now?

    .................................................. .......
    ...
    Thanks from Frostx
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