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anonymous

  • one year ago

http://prntscr.com/8jlzb3

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  1. mathmate
    • one year ago
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    hints: when a parabola opens up, the leading coefficient (i.e. coefficient of x^2) is positive. when a parabola opens down, the leading coefficient is negative.

  2. anonymous
    • one year ago
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    Would I FOIL?

  3. mathmate
    • one year ago
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    hints, continued: If a parabola crosses the x-axis at two places, a and b, then (x-a) and (x-b) are factors of the equation of the parabola.

  4. mathmate
    • one year ago
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    You don't need to foil. It's easier when factored, see "hints continued".

  5. anonymous
    • one year ago
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    Would it be B then? since they're both x-...?

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