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douglas12

Solve the equation: x^2 + 5x + 22 = 0 A. 0 B. -2.5 C. 15.75 D. No solution

  • 9 months ago
  • 9 months ago

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  1. uri
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    @douglas12 Quad equation?

    • 9 months ago
  2. douglas12
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    I think so.

    • 9 months ago
  3. uri
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    Use the quad formula :http://blogs.discovermagazine.com/loom/files/2008/07/quadratic.jpg

    • 9 months ago
  4. uri
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    a:1 b:5 c:22

    • 9 months ago
  5. douglas12
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    so is the answer B

    • 9 months ago
  6. abb50
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    to check, substitute is (-2.5)^2 + 5(-2.5) + 22 = 0? if yes, then you're right. if not, try again

    • 9 months ago
  7. douglas12
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    No it's not 0

    • 9 months ago
  8. abb50
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    then pick another letter and keep on substituting. i for one think it's faster (only applicable in multiple choice questions)

    • 9 months ago
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spraguer (Moderator)
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