Mathematics
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OpenStudy (anonymous):
Could somebody please walk me through this problem?...
(3-3i) divided by / (3+4i)
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OpenStudy (anonymous):
Well first you need all like terms together correct?
What I would personally do is just make the i values equal
OpenStudy (anonymous):
Wouldn't I do that by multiplying the left side by the right side?
OpenStudy (anonymous):
Like say the equation is this\[\frac{ 3-3i }{3+4i }\]
OpenStudy (anonymous):
It is that (:
OpenStudy (anonymous):
You should try getting the equation to eliminate the i
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OpenStudy (anonymous):
So multiply the numerator by the denominator?
OpenStudy (anonymous):
Yes try that
OpenStudy (anonymous):
Multiply the entire division by the denominator so as to eliminate it
OpenStudy (anonymous):
So.... 9-12i?
OpenStudy (anonymous):
Did you foil?
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OpenStudy (anonymous):
Ohhh no one second!
OpenStudy (anonymous):
Then it comes out 0?
OpenStudy (anonymous):
Wouldn't the answer be 9-12i?
OpenStudy (anonymous):
No?
OpenStudy (anonymous):
I have options...
\[\frac{ (21-21i) }{ 7 }\]
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OpenStudy (anonymous):
isnt the equation \[9+12i+9i-12i\]
OpenStudy (anonymous):
\[\frac{ (3-21i) }{ 7 }\]
OpenStudy (anonymous):
\[\frac{ (-3-21i) }{ 25 }\]
OpenStudy (anonymous):
or...
OpenStudy (anonymous):
\[\frac{ (3-21i) }{ 25 }\]
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OpenStudy (anonymous):
How are you getting this?
OpenStudy (anonymous):
Listen, after multiplying the bottom of this division by itself it gets eliminated so the bottom is no longer there.
OpenStudy (anonymous):
Then you just multiply the top by what you multiplied the bottom with and there you FOIL
OpenStudy (anonymous):
Those are the options I have to choose from.
OpenStudy (anonymous):
Really? those are the answers?