document.write( "Question 278778: i must simplify (2+3i)(2-3i) i think the answer is 4-9i is that correct \n" ); document.write( "
Algebra.Com's Answer #202834 by richwmiller(17219)\"\" \"About 
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foil
\n" ); document.write( "f=2*2
\n" ); document.write( "o=-3i*2
\n" ); document.write( "i=2*3i
\n" ); document.write( "l=-9i^2=-9*(-1)=+9
\n" ); document.write( "4-6i+6i+9=13
\n" ); document.write( "
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