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Katlyn99 Group Title

Solve the following using the quadratic formula. Round to the nearest tenth, if necessary. x2 + 5x - 2 = 0 {-2, 5} {-5.4, 0.4} {-1, 0.5} No real solution

  • one year ago
  • one year ago

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  1. Mertsj Group Title
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    Do you know the quadratic formula?

    • one year ago
  2. Mertsj Group Title
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    Look in you book. It's in there.

    • one year ago
  3. Mertsj Group Title
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    Did you find it?

    • one year ago
  4. Katlyn99 Group Title
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    yes

    • one year ago
  5. Mertsj Group Title
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    So in your equation, a = 1, b = 5, and c = -2 Just plug in those numbers in place of the letters.

    • one year ago
  6. Mertsj Group Title
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    \[x=\frac{-5\pm \sqrt{5^2-4(1)(-2)}}{2(1)}\]

    • one year ago
  7. Mertsj Group Title
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    Does yours look like that so far?

    • one year ago
  8. Katlyn99 Group Title
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    yes

    • one year ago
  9. Mertsj Group Title
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    \[x=\frac{-5\pm \sqrt{33}}{2}\]

    • one year ago
  10. Mertsj Group Title
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    Oh gees. They gave the answers in decimal form so now we need a calculator. Do you have one handy?

    • one year ago
  11. Katlyn99 Group Title
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    yes

    • one year ago
  12. Mertsj Group Title
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    \[\frac{-5+\sqrt{33}}{2}=.37\approx .4\] \[\frac{-5-\sqrt{33}}{2}=-5.37\approx -5.4\]

    • one year ago
  13. Mertsj Group Title
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    Is that what you got?

    • one year ago
  14. Katlyn99 Group Title
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    yes

    • one year ago
  15. Mertsj Group Title
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    Good job!!

    • one year ago
  16. Katlyn99 Group Title
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    Thanks:)

    • one year ago
  17. Mertsj Group Title
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    you're welcome

    • one year ago
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