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anonymous

  • one year ago

Solve this quadratic equation using the quadratic formula. x2 + 8x - 5 = 0

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  1. pooja195
    • one year ago
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    List your A,B,C values keeping this in mind \[\huge~\rm~ax^2+bx+c=0\]

  2. anonymous
    • one year ago
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    \[\frac{ -8\pm \sqrt{(8)^{2}-4(1)(5)} }{ 2(1) }\]

  3. jigglypuff314
    • one year ago
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    don't forget about the minus sign (negative) in front of that 5 :)

  4. anonymous
    • one year ago
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    thanks

  5. GreenCat
    • one year ago
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    Perfect @gizmo25 Now simplify. \[\frac{ -8 \pm \sqrt{64-20} }{ 2 }\]\[\frac{ -8 \pm \sqrt{44} }{ 2 }\]Oops; I was about to solve it all for you. Can you work it out from here? Hint: Pull out what you can from the square root.

  6. jigglypuff314
    • one year ago
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    @GreenCat note that I just mentioned the negative so it should be a 64 + 20 instead :)

  7. GreenCat
    • one year ago
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    oh yes; it is (-5). Sorry.

  8. GreenCat
    • one year ago
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    I was working from Gizmo's equation. @gizmo25 Remember to include the negative in "-5" there.

  9. GreenCat
    • one year ago
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    \[\frac{ -8 \pm \sqrt{64+20} }{ 2 }\]\[\frac{ -8 \pm \sqrt{84} }{ 2 }\]Here You go.

  10. anonymous
    • one year ago
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    thanks :)

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