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Math Help - Parabolas

  1. #1
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    Parabolas

    I'm confused with this question. Can anyone explain how to do it?

    The vertex of a parabola is (-2,-4). One x-intercept is 7. What is the other x-intercept?
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  2. #2
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    Quote Originally Posted by looch45 View Post
    I'm confused with this question. Can anyone explain how to do it?

    The vertex of a parabola is (-2,-4). One x-intercept is 7. What is the other x-intercept?
    here's a hint ... the vertex is midway between the two roots.
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