document.write( "Question 36600: Express the following as a complex number in the form a + ib:\r
\n" ); document.write( "\n" ); document.write( "(3 - i) (5 + 12i)
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Algebra.Com's Answer #22527 by tran3209(100)\"\" \"About 
You can put this solution on YOUR website!
(3-1) (5+12i)\r
\n" ); document.write( "\n" ); document.write( "15 + 36i - 5i + 12i^2\r
\n" ); document.write( "\n" ); document.write( "15 + 31i + 12i^2\r
\n" ); document.write( "\n" ); document.write( "15+ 31i + (12)(-1) <===== * replace i^2 by -1\r
\n" ); document.write( "\n" ); document.write( "The answer: 3+31i
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