Condor34
  • Condor34
Simplify the expression sqrt -9/ (3-2i)+(1+5i)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Nnesha
  • Nnesha
first combine like terms
Nnesha
  • Nnesha
\[\huge\rm \frac{ \sqrt{-9} }{ 3-2i+1+5i }\]
Condor34
  • Condor34
12-9i/25 12-9i/7 9+12i/25 9+12i/7

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Condor34
  • Condor34
and yes
Condor34
  • Condor34
square root of 9 over 4 plus 3i?
Condor34
  • Condor34
-9*
Nnesha
  • Nnesha
alright and you separate -9 \[\sqrt{-1} \times \sqrt{9}\] and i =what ?
Nnesha
  • Nnesha
yep right
Condor34
  • Condor34
i = imaginary number? or -1
Nnesha
  • Nnesha
i imaginary
Nnesha
  • Nnesha
general question
Condor34
  • Condor34
ok
Nnesha
  • Nnesha
\[\bf i = \sqrt{-1}\] \[\bf i^2 = -1\] and that's why we have to seprate of negative one and positive 9
Condor34
  • Condor34
ok
Nnesha
  • Nnesha
\[\huge\rm \frac{ \sqrt{-1} \times \sqrt{9} }{ 4-3i }\] so replace sqrt -1 by 1 and multiply both the denominator and the numerator by the conjugate of 4-3i
Condor34
  • Condor34
-9/25+12i/25?
Nnesha
  • Nnesha
nope how did you get 25
Condor34
  • Condor34
just guessed
Nnesha
  • Nnesha
why did you guess ?
Nnesha
  • Nnesha
you are not 'n the exam haall this is the time to learn not to guess :=)
Condor34
  • Condor34
Honestly I have no idea how to do this and not trying to be rude but i need the answer because i am taking a timed exam.......
Nnesha
  • Nnesha
really so it's a test question ..sorryy..
Condor34
  • Condor34
yes
Nnesha
  • Nnesha
do you know we are not allowed to help u on your test or quiz? it's against the coc
Condor34
  • Condor34
I know but i really dont understand this and i have also seen alot of people do the same thing as me
Nnesha
  • Nnesha
well..if someone don't aa bad thing then.. you don't have to follow them you will do better without cheating..
Condor34
  • Condor34
ok, thanks for the help anway
Nnesha
  • Nnesha
what is square root of 9? replace square root of -1 by i multiply by the conjugate 4-3i if you don't know what conjugate then search it

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