document.write( "Question 357140: Perform indicated operation and simplify. Write each answer in form of a+bi
\n" ); document.write( "1. (4+i)(2+3i)
\n" ); document.write( "2. 3i/4+2i
\n" ); document.write( "3. (5-2i)/(3+6i)
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Algebra.Com's Answer #255041 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
I'll do the first one to get you started.\r
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\n" ); document.write( "\n" ); document.write( "# 1\r
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\n" ); document.write( "\n" ); document.write( "\"%284%2Bi%29%2A%282%2B3i%29\" Start with the given expression.\r
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\n" ); document.write( "\n" ); document.write( "\"%284%29%282%29%2B%284%29%283i%29%2B%28i%29%282%29%2B%28i%29%283i%29\" FOIL.\r
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\n" ); document.write( "\n" ); document.write( "\"8%2B12i%2B2i%2B3i%5E2\" Multiply.\r
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\n" ); document.write( "\n" ); document.write( "\"8%2B12i%2B2i%2B3%28-1%29\" Replace \"i%5E2\" with \"-1\". Note: \"i%5E2=-1\".\r
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\n" ); document.write( "\n" ); document.write( "\"8%2B12i%2B2i-3\" Multiply.\r
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\n" ); document.write( "\n" ); document.write( "\"5%2B14i\" Combine like terms.\r
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\n" ); document.write( "\n" ); document.write( "So \"%284%2Bi%29%2A%282%2B3i%29=5%2B14i\".
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