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anonymous

  • 5 years ago

Find the roots of the quadratic equation x2 − 8x + 8 = 0 . x1 = x2 =

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  1. radar
    • 5 years ago
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    \[(-b \pm \sqrt{b ^{2}-4ac)}/2a\]

  2. radar
    • 5 years ago
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    b=-8, a=1, and c=8

  3. anonymous
    • 5 years ago
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    I prefer: \[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a} \] \.[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a} \]

  4. radar
    • 5 years ago
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    that's more betterr

  5. anonymous
    • 5 years ago
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    6.828, 1.17157

  6. radar
    • 5 years ago
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    Car2021, You have everything you need to solve it, including some answers that you can use as a check.

  7. anonymous
    • 5 years ago
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    ok so if i have \[8\pm 4\sqrt{2}/2\]..how would i solve that?

  8. radar
    • 5 years ago
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    You could simplify further and get \[4\pm 2\sqrt{2}\]

  9. radar
    • 5 years ago
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    Solve for both roots

  10. radar
    • 5 years ago
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    Use the + value for one root, then use the - for the other \[4-2\sqrt{2}\]

  11. radar
    • 5 years ago
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    \[4+2\sqrt{2}\]

  12. anonymous
    • 5 years ago
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    soo would it be 2 sqrt 2 for one and 6 sqrt 2 for the other

  13. radar
    • 5 years ago
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    Almost, first solve for the 2 times the square root of 2. this should give you a value of 2.828. Now with that you will use to get the two roots. First add that to 4, that will be one root. Then use it again subtracting it from four getting the second root.

  14. radar
    • 5 years ago
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    Let me know what you get.

  15. anonymous
    • 5 years ago
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    if, ax^2 + bx + c is a quadratic equation then we can find its roots by using a formula http://upload.wikimedia.org/math/3/e/a/3ea647783b5121989cd87ca3bb558916.png now try to solve it yourself. don't just go for the solution.

  16. radar
    • 5 years ago
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    He has solved it down to the point of\[4\pm 2\sqrt{2}\]

  17. anonymous
    • 5 years ago
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    radar ..when u get done will you help me?

  18. anonymous
    • 5 years ago
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    or chatindia..lol

  19. radar
    • 5 years ago
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    Yes, would be glad too, providing I can. I am just reviewing math from the past lol

  20. anonymous
    • 5 years ago
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    lol okay thank you! :))

  21. radar
    • 5 years ago
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    Is your problem already posted laurenlynn?

  22. anonymous
    • 5 years ago
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    yes

  23. anonymous
    • 5 years ago
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    it's the one that says PLEASE HELP ME!!! at the top..haha

  24. radar
    • 5 years ago
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    O.K. I will look for it.

  25. radar
    • 5 years ago
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    Car2021, I believe you have this problem whipped, cantorset has given you the actual answers in an early post of this thread. Good luck

  26. anonymous
    • 5 years ago
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    what's the problem you are getting in solving this question. this latex code doesn't display in my phone. i can't understand this latex codes.

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