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    Emily2115's Avatar
    Emily2115 Posts: 2, Reputation: 1
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    #1

    Dec 10, 2009, 08:49 PM
    quadratic formula
    In the quadratic formula (ax^2 + bx + c = 0), is it possible to solve for a and b, if you know the zeros and the value of c?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Dec 11, 2009, 05:10 AM
    Quote Originally Posted by Emily2115 View Post
    In the quadratic formula (ax^2 + bx + c = 0), is it possible to solve for a and b, if you know the zeros and the value of c?
    The quadratic formula is

    Plug in your known zeros for x and the value of c

    You now have two equations with two unknowns. Give it a go.

    Do you have a specific problem?
    InfoJunkie4Life's Avatar
    InfoJunkie4Life Posts: 1,409, Reputation: 81
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    #3

    Dec 12, 2009, 02:46 PM

    Depending on your variables, you may end up with another set of equations, that define what pair of values will work for A and B.

    Then again, with two equations sharing the same variable you may be able to use one to reduce the other.
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