poopsiedoodle
Can someone explain how to do quadratic equations with complex numbers?
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precal
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yes, that means when you graph your quadratic function, it does not cross the x axis at all
precal
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|dw:1358903985103:dw|here is an example of a quadratic with complex solutions
poopsiedoodle
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Okay, but I still need help with solving them.
precal
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well then post one so we can work it together
poopsiedoodle
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Okay. Just a second.
poopsiedoodle
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√(-36) - √(-40) It's one of the example problems that I can't get right.
precal
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|dw:1358904893711:dw|
poopsiedoodle
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That makes sense I guess :P
precal
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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....
poopsiedoodle
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How about an actual quadratic equation now? :3
precal
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post it, makes no difference to me.......
poopsiedoodle
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\[\Huge x^{2}+6x+11 = 0\]
precal
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|dw:1358905661660:dw|do you see the negative number under the radical
precal
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that tells you that your solution is complex
precal
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|dw:1358905735721:dw|
poopsiedoodle
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OH. Okay. I get it now. Thanks! :D
precal
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another way to do it is by completing the square but the quadratic formula is easier to do it by.
precal
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yw
poopsiedoodle
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Actually, I don't :<
precal
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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