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KJ4UTS

  • one year ago

Solve by the intersection of graphs method. x^2-2x-8=112

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  1. KJ4UTS
    • one year ago
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    I think the answer is only 12

  2. KJ4UTS
    • one year ago
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    My choices are: A. 12 B. -10 C. 12 or -10 D. -12 or 10

  3. KJ4UTS
    • one year ago
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    @peachpi

  4. anonymous
    • one year ago
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    that's a pain to graph. :/ If you had \(x^2-2x-120=0\), how would you factor?

  5. anonymous
    • one year ago
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    The parabola looks roughly like this, so there are two solutions |dw:1441730177079:dw|

  6. Michele_Laino
    • one year ago
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    hint: you have to search for intersection between a line whose equation is: \( \large y=112\) and a parabola whose equation is: \( \large x^2-2x-8 \)

  7. KJ4UTS
    • one year ago
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    then wouldn't the answer be C. 12 or -10?

  8. anonymous
    • one year ago
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    yes

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