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jessica824

  • 3 years ago

how do you find the real cube roots of -64?

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  1. itsmylife
    • 3 years ago
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    you cant , its a complex number if your going for root of it

  2. confusedstudent2012
    • 3 years ago
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    i think it will be 8 i

  3. itsmylife
    • 3 years ago
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    nope

  4. itsmylife
    • 3 years ago
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    4i

  5. itsmylife
    • 3 years ago
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    4*4*4=64 but still thats a complex number

  6. confusedstudent2012
    • 3 years ago
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    yes, i was thinking sqaure for some reason. 4i

  7. jessica824
    • 3 years ago
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    thank you!!

  8. confusedstudent2012
    • 3 years ago
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    but that's an imaginary number not a "real" root

  9. itsmylife
    • 3 years ago
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    ;)

  10. jessica824
    • 3 years ago
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    what about -27/216??

  11. itsmylife
    • 3 years ago
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    4 is cube root of 64 and since its -64 so its an imaginary number i never said its real

  12. itsmylife
    • 3 years ago
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    n @jessica824 you can find it

  13. jessica824
    • 3 years ago
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    i dont know how

  14. confusedstudent2012
    • 3 years ago
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    no, i wasn't saying you said anything. I was responding the the original question from the original poster where the person asked about a "real" root.

  15. zepdrix
    • 3 years ago
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    @itsmylife -4 should be the cube root of -64.\[\large (-4)(-4)(-4)=-64\] I'm not sure why you're thinking it would be complex, did you confuse it with the square root? :o\[\large (4i)(4i)(4i)=-64i\]

  16. itsmylife
    • 3 years ago
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    aha my honest mistake thanks for correcting me @zepdrix

  17. zepdrix
    • 3 years ago
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    Happens to all of us c: those darn brain farts! heh

  18. itsmylife
    • 3 years ago
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    lol :P

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