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Math Help - Solving quadratic equations.

  1. #1
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    Solving quadratic equations.

    Hi... I need help with some excersises:


    1) Solve x2 3x = 8
    Opt. A)
    Opt. B)
    Opt. C) Opt. D)

    2) Solve 3x2 4x 4 = 0

    Opt. A)
    Opt. B)
    Opt. C) Opt. D)

    3) Solve x2 + 4x + 8 = 0

    A)
    B)
    C) D)


    4) Solve 3x2 = 12x 15

    A) x = 4 2
    B) x = 4
    C) x = 2 2 D) x = 2



    5) Solve 3x2 + 30x 90 = 0
    A)
    B)
    C) D)
    Last edited by mr fantastic; July 18th 2011 at 02:26 PM. Reason: Re-titled.
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  2. #2
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    Re: Help with some excersises... quadratics...!

    1. Your images can't be read.

    2. What effort have you shown to work out these yourself?

    3. It is against our policy to do work for a student that counts towards their final grade (as this clearly does).


    Show some effort and where you are stuck and you might get some more help.
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  3. #3
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    Re: Help with some excersises... quadratics...!

    Man the problem is that i hate math.. I mean.. I love counting and business... but not this part of the math... this part I dont like it.... that is why I wanna pass it quickly, so I can get into the term I love the most.... please help... don't be that bad with me.. :$
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  4. #4
    Member Goku's Avatar
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    Re: Help with some excersises... quadratics...!

    x^2 - 3x =-8
    x^2 - 3x + 8 = 0

    Now you factorize here is link if you do not know how :
    Factoring Quadratics: The Simple Case

    and this one uses the Quadratric formula:
    The Quadratic Formula Explained

    Try IT
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  5. #5
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    Re: Help with some excersises... quadratics...!

    Wow thank you very muccch.... that helped a lot... THANNKSS... Now I understand how to do it..
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