document.write( "Question 1163105: Sherry’s teacher told her that if she was foiling conjugates she would not have any imaginary parts left. She has been trying to figure out why she foiled the following conjugate and was left with an imaginary. What did she do wrong? After figuring out what she did wrong, simplify correctly.
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\n" ); document.write( "(2+3i) is the conjugate
\n" ); document.write( "(2-3i)(2+3i)
\n" ); document.write( "4+6i-6i+9i^2
\n" ); document.write( "4-9i^2\r
\n" ); document.write( "\n" ); document.write( "When I do this problem my answer comes out as 13. I know how to do this correctly but I'm not sure what the mistake was in this question, thanks! \n" ); document.write( "
Algebra.Com's Answer #787082 by ikleyn(52799)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "The last line  MUST  BE  COMPLETED  in this way\r
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\n" ); document.write( "                4-9i^2 = 4 -9*(-1) = 4 + 9 = 13.         the final ANSWER\r
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\n" ); document.write( "\n" ); document.write( "to eliminate any mentioning of the imaginary unit  \" i \"\r
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\n" ); document.write( "\n" ); document.write( "(although  \" i^2 \" is just a real number  -1).\r
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