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December 15th, 2012, 11:35 PM   #11
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Re: Help complex numbers

I dont know this step( can you help more?
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December 15th, 2012, 11:39 PM   #12
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Re: Help complex numbers



Now, combine the numbers within the parentheses.
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December 16th, 2012, 12:00 AM   #13
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Re: Help complex numbers

I get this:
-6/5 -12/5i
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December 16th, 2012, 12:14 AM   #14
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Re: Help complex numbers

Are it right?
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December 16th, 2012, 12:29 AM   #15
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Re: Help complex numbers

Yes, that's correct!
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December 16th, 2012, 12:37 AM   #16
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Re: Help complex numbers

The answer on the book are : -6/5 * (1+2i)
Maybe tha author have make mistakes.
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December 16th, 2012, 12:45 AM   #17
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Re: Help complex numbers

Im not sure but on the text the answer is : -6/5 * (1+2i)
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December 16th, 2012, 12:57 AM   #18
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Re: Help complex numbers

That is equivalent to your answer, just factor -6/5 out. I am used to the result being given in the form a + bi.
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December 16th, 2012, 01:01 AM   #19
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Re: Help complex numbers

So both of them are correct?
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December 16th, 2012, 01:09 AM   #20
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Re: Help complex numbers

Yes, they are just different ways to write the same thing. Observe that:

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