document.write( "Question 684061: (9-11i)^2 \n" ); document.write( "

Algebra.Com's Answer #423904 by ReadingBoosters(3246) $\"\"$ $\"About$

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(9-11i)(9-11i)
\n" ); document.write( "FOIL
\n" ); document.write( "9(9) + 9(-11i) - 11i(9) - 11i(-11i)
\n" ); document.write( " $\"81+-+99i+-+99i+%2B+121i%5E2\"$
\n" ); document.write( "Knowing $\"i%5E2+=+sqrt%28-1%29%5E2+=+-1\"$
\n" ); document.write( " $\"81+-+198i+%2B+121%28-1%29\"$
\n" ); document.write( " $\"81+-+198i+-+121\"$
\n" ); document.write( "...
\n" ); document.write( " $\"highlight_green%28-40+-+198i%29\"$
\n" ); document.write( ".....................
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