document.write( "Question 1123289: Show that ǀz1 + z2ǀ˄2 + ǀz1 - z2ǀ˄2= 2ǀz1ǀ˄2 + 2ǀz2ǀ˄2 \n" ); document.write( "
Algebra.Com's Answer #739641 by math_helper(2461)\"\" \"About 
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\"z%5B1%5D+=+a%2Bbi+\"
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\n" ); document.write( "= \"+2a%5E2+%2B+2c%5E2+%2B+2b%5E2%2B2d%5E2+\"\r
\n" ); document.write( "\n" ); document.write( "= \"+2%28a%5E2%2Bb%5E2%29+%2B+2%28c%5E2%2Bd%5E2%29+\"
\n" ); document.write( "= \"2abs%28z%5B1%5D%29%5E2%2B2abs%28z%5B2%5D%29%5E2+\"
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