anonymous
  • anonymous
please help me with this square root problem...
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
\[\left( -5-\sqrt{-9} \right)^{2}\]
anonymous
  • anonymous
16+i10*9^1/2
anonymous
  • anonymous
well what is -5 *-5? remember negative times negative is a positive then what is rt-9^2?

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anonymous
  • anonymous
25 and 3 right?
anonymous
  • anonymous
and rvgupta, i come up with that answer too but its not one of my multiple choice options
anonymous
  • anonymous
25 is correct, but if you sq rt a number and then sq it again you get the original number
anonymous
  • anonymous
so you've rooted it but not re-squared it
anonymous
  • anonymous
so it is 9?
anonymous
  • anonymous
16
anonymous
  • anonymous
is that an option?
anonymous
  • anonymous
for some reason i keep coming up with 16-10i\[\sqrt{9}\]
anonymous
  • anonymous
there is 16 + 30i
anonymous
  • anonymous
where did the 10i come from?
anonymous
  • anonymous
i am not really sure... i know i worked it out wrong, and 10i isnt even an option....
anonymous
  • anonymous
yes
anonymous
  • anonymous
think of it this way -5*-5 -rt9*-rt9 -5*-rt9 -5*-rt9 and add all those together
anonymous
  • anonymous
16+30i

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