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Thread: Determining Values for A, B, and C in Quadratic Formula

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  1. #1

    Determining Values for A, B, and C in Quadratic Formula

    I have a question:

    For the quadratic equation (2x+1)(x+3)=0, does 2=a, 1=b, and 3=c?
    Last edited by mmm4444bot; 07-20-2012 at 08:04 PM. Reason: Title typo, title typo, title typo

  2. #2
    Elite Member mmm4444bot's Avatar
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    Quote Originally Posted by TiaharaJBennett View Post

    (2x + 1)(x + 3) = 0
    The Zero-Product Property tells us that

    x + 3 = 0

    OR

    2x + 1 = 0


    Let's solve x + 3 = 0.

    Subtract 3 from both sides

    x = -3

    There's one answer.


    Let's solve 2x + 1 = 0

    Subtract 1 from both sides then divide both sides by 2.

    x = -1/2

    There's the other answer.


    Now, if you still believe that using the Quadratic Formula is an easier way to get

    x = -3 or x = -1/2

    then I must tell you that you are entitled to your opinion.

    Cheers

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