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boomerang285

  • 2 years ago

please help me with this square root problem...

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  1. boomerang285
    • 2 years ago
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    \[\left( -5-\sqrt{-9} \right)^{2}\]

  2. rvgupta
    • 2 years ago
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    16+i10*9^1/2

  3. littlepixie99
    • 2 years ago
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    well what is -5 *-5? remember negative times negative is a positive then what is rt-9^2?

  4. boomerang285
    • 2 years ago
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    25 and 3 right?

  5. boomerang285
    • 2 years ago
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    and rvgupta, i come up with that answer too but its not one of my multiple choice options

  6. littlepixie99
    • 2 years ago
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    25 is correct, but if you sq rt a number and then sq it again you get the original number

  7. littlepixie99
    • 2 years ago
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    so you've rooted it but not re-squared it

  8. boomerang285
    • 2 years ago
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    so it is 9?

  9. boomerang285
    • 2 years ago
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    16

  10. littlepixie99
    • 2 years ago
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    is that an option?

  11. boomerang285
    • 2 years ago
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    for some reason i keep coming up with 16-10i\[\sqrt{9}\]

  12. boomerang285
    • 2 years ago
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    there is 16 + 30i

  13. littlepixie99
    • 2 years ago
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    where did the 10i come from?

  14. boomerang285
    • 2 years ago
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    i am not really sure... i know i worked it out wrong, and 10i isnt even an option....

  15. boomerang285
    • 2 years ago
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    yes

  16. littlepixie99
    • 2 years ago
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    think of it this way -5*-5 -rt9*-rt9 -5*-rt9 -5*-rt9 and add all those together

  17. estudier
    • 2 years ago
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    16+30i

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