i7ndiHendira i7ndiHendira
  • 21-11-2016
  • Mathematics
contestada

Rationalize the denominator of sqrt -9 / (4-7i) - (6-6i) ...?

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HomertheGenius
HomertheGenius HomertheGenius
  • 24-11-2016
√(- 9 ) / (( 4 - 7 i ) - ( 6 - 6 i )) = 3 i / ( 4 - 7 i - 6 + 6 i ) =
= 3 i / ( - 2 - i ) = - 3 i / ( 2 + i ) =
[tex]= \frac{-3i}{2 + i}* \frac{2 - i}{2 - i}= \\ = \frac{-6i+3i ^{2} }{2- i^{2} }= \\ = \frac{-3-6i}{2+1}= \frac{-3-6i}{3}= [/tex]
= - 1 - 2 i

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oopsgiseeelle
oopsgiseeelle oopsgiseeelle
  • 26-08-2021

Answer:

-3-6i/5 is the answer it was also correct on the test ! :D

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