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Math Help - Quadratic Functions

  1. #1
    Junior Member
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    Quadratic Functions

    A quadratic function has x intercepts 2 and -3 crosses the y axis at -1.

    What is the equation?
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  2. #2
    MHF Contributor red_dog's Avatar
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    Let f(x)=ax^2+bx+c

    We have

    f(2)=0\Rightarrow 4a+2b+c=0

    f(-3)=0\Rightarrow 9a-3b+c=0

    f(0)=-1\Rightarrow c=-1

    Now find a, b.
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