document.write( "Question 1037398: If x+y+z=12,x2+y2+z2=64,find xy+yz+zx \n" ); document.write( "

Algebra.Com's Answer #652049 by ikleyn(52790) $\"\"$ $\"About$

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\n" ); document.write( "If x+y+z=12, x2+y2+z2=64, find xy+yz+zx
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document.write( "Use   -  = .\r\n" );
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document.write( "It gives   -  = ,  or\r\n" );
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document.write( " =  = 40.\r\n" );
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document.write( "Answer.  40.\r\n" );
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