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poopsiedoodle

  • 3 years ago

Can someone explain how to do quadratic equations with complex numbers?

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  1. precal
    • 3 years ago
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    yes, that means when you graph your quadratic function, it does not cross the x axis at all

  2. precal
    • 3 years ago
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    |dw:1358903985103:dw|here is an example of a quadratic with complex solutions

  3. poopsiedoodle
    • 3 years ago
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    Okay, but I still need help with solving them.

  4. precal
    • 3 years ago
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    well then post one so we can work it together

  5. poopsiedoodle
    • 3 years ago
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    Okay. Just a second.

  6. poopsiedoodle
    • 3 years ago
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    √(-36) - √(-40) It's one of the example problems that I can't get right.

  7. precal
    • 3 years ago
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    |dw:1358904893711:dw|

  8. poopsiedoodle
    • 3 years ago
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    That makes sense I guess :P

  9. precal
    • 3 years ago
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    this is just complex numbers. Complex numbers can be added, subtracted, multiplied and divided......not a big deal.....electrical engineers use them....

  10. poopsiedoodle
    • 3 years ago
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    How about an actual quadratic equation now? :3

  11. precal
    • 3 years ago
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    post it, makes no difference to me.......

  12. poopsiedoodle
    • 3 years ago
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    \[\Huge x^{2}+6x+11 = 0\]

  13. precal
    • 3 years ago
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    |dw:1358905661660:dw|do you see the negative number under the radical

  14. precal
    • 3 years ago
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    that tells you that your solution is complex

  15. precal
    • 3 years ago
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    |dw:1358905735721:dw|

  16. poopsiedoodle
    • 3 years ago
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    OH. Okay. I get it now. Thanks! :D

  17. precal
    • 3 years ago
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    another way to do it is by completing the square but the quadratic formula is easier to do it by.

  18. precal
    • 3 years ago
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    yw

  19. poopsiedoodle
    • 3 years ago
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    Actually, I don't :<

  20. precal
    • 3 years ago
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    close this problem and post a new one. You can send me a notification and we can work on another one together

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